TWI769559B

TWI769559B - Method for evaluating corrosion resistance of coating

Info

Publication number: TWI769559B
Application number: TW109135975A
Authority: TW
Inventors: 王振興; 王聖方; 王介勇; 沈博凱; 楊詠荏
Original assignee: 遠東科技大學
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2022-07-01
Also published as: TW202217296A

Abstract

A method for evaluating corrosion resistance of coating is provided. The method is applicable to a to-be-tested object which includes a coating layer and a first metal material covered by the coating layer. The method includes the following steps: placing the to-be-tested object and a conductor into an electrolyte and then applying a voltage by a multimeter to perform electrolysis, wherein the to-be-tested object and the conductor are an anode and a cathode respectively; measuring a resistance value of the to-be-tested object by the multimeter during electrolysis; comparing the measured resistance value with a preset resistance value, and a measured resistance-time curve with a preset resistance-time curve, and determining accordingly the corrosion resistance ability of the coating layer.

Description

評估鍍膜層耐蝕性方法 Methods for evaluating the corrosion resistance of coatings

本發明係關於一種評估鍍膜層耐蝕性方法，尤指利用三用電表量測的評估鍍膜層耐蝕性方法。 The present invention relates to a method for evaluating the corrosion resistance of a coating layer, in particular to a method for evaluating the corrosion resistance of the coating layer measured by a three-meter electric meter.

生活中常見金屬的使用，例如鋁門窗、金屬層架等，為了延長使用的期限，這些金屬的表面會鍍上一層鍍膜層，即一抗氧化膜，以防止金屬表面因為氧化而產生鏽蝕。 The use of common metals in life, such as aluminum doors and windows, metal shelves, etc., in order to prolong the service life, the surface of these metals will be coated with a coating layer, that is, an anti-oxidation film, to prevent the metal surface from rusting due to oxidation.

而一般檢驗該鍍膜層耐蝕性的方法，需使用特定的一儀器、配合標準大小的一試片，及特定的一電解液以進行電解實驗，然而，該儀器的價錢昂貴，又已經鍍上該鍍膜層的金屬大小已固定，在進行電解實驗時，還需特別製作標準大小的該試片做測試，此外，該電解液的種類及酸鹼度也為固定，無法根據實際檢驗的需求再調配，因此，習用檢驗該鍍膜層耐蝕性的方法受到侷限。 In general, the method of testing the corrosion resistance of the coating layer requires the use of a specific instrument, a test piece of standard size, and a specific electrolyte to conduct electrolysis experiments. However, the instrument is expensive and has been plated with the The metal size of the coating layer has been fixed. When conducting the electrolysis experiment, it is necessary to make a special test piece of standard size for testing. In addition, the type and pH of the electrolyte are also fixed, which cannot be reconfigured according to the actual inspection needs. Therefore, , the conventional method of testing the corrosion resistance of the coating layer is limited.

爰此，本發明人為使檢驗該鍍膜層耐蝕性的方法更簡單容易、成本更低，而提出一種評估鍍膜層耐蝕性方法。 Therefore, the present inventor proposes a method for evaluating the corrosion resistance of the coating layer in order to make the method for testing the corrosion resistance of the coating layer simpler, easier and cheaper.

該評估鍍膜層耐蝕性方法適用於一待測物件，該待測物件包括一鍍膜層和一第一金屬基材，該鍍膜層覆蓋該第一金屬基材，該評估鍍膜層耐蝕性方法包含以下步驟。 The method for evaluating the corrosion resistance of the coating layer is suitable for an object to be tested, the object to be tested includes a coating layer and a first metal substrate, the coating layer covers the first metal substrate, and the method for evaluating the corrosion resistance of the coating layer includes the following step.

將該待測物件及一導電體皆放進一電解液內，以一三用電表做為提供電解所需的一外加電壓進行電解，其中該外加電壓為9伏特的倍數，該三用電表的一正極接點及一負極接點分別電性連接該待測物件之第一金屬基材及該導電體，該待測物件及該導電體分別為一陽極及一陰極；藉由該三用電表量測該待測物件在電解過程的一電阻值；及比較該電阻值與一預設電阻值的大小，及比較多個所述電阻值隨電解時間的變化曲線與多個所述預設電阻值隨電解時間的變化曲線，以判斷該鍍膜層的耐蝕優劣，其中，該預設電阻值與一標準物件的電阻值正相關，該標準物件包括一第二金屬基材，該第二金屬基材的材質與該第一金屬基材的材質相同。 Put the object to be tested and a conductor into an electrolyte, and perform electrolysis with a three-use electricity meter as an applied voltage required for electrolysis, wherein the applied voltage is a multiple of 9 volts, and the three-use electricity meter A positive electrode contact and a negative electrode contact are respectively electrically connected to the first metal base material of the object to be tested and the conductor, the object to be tested and the conductor are respectively an anode and a cathode; The electric meter measures a resistance value of the object to be tested during the electrolysis process; and compares the resistance value with a preset resistance value, and compares the variation curves of the resistance values with the electrolysis time with the predetermined resistance values. A curve of resistance value versus electrolysis time is set to determine the corrosion resistance of the coating layer, wherein the preset resistance value is positively correlated with the resistance value of a standard object, the standard object includes a second metal substrate, the second The material of the metal base material is the same as the material of the first metal base material.

進一步，藉由該三用電表量測該待測物件在電解過程中多個電解時間所分別對應的多個所述電阻值，根據該等電解時間及對應的該等電阻值獲得一電阻值函數，該電阻值函數即為該等電阻值隨電解時間的變化曲線，該電阻值函數的斜率變化在一和緩電解時間後小於5%以下，判定該和緩電解時間為該鍍膜層的一耐蝕時間，將該和緩電解時間對應的一和緩電阻值與該預設電阻值比較，以判斷該鍍膜層的耐蝕優劣。 Further, measure a plurality of the resistance values corresponding to a plurality of electrolysis times of the object to be tested in the electrolysis process by the three-use electric meter, and obtain a resistance value according to the electrolysis times and the corresponding resistance values function, the resistance value function is the change curve of these resistance values with the electrolysis time, the slope change of the resistance value function is less than 5% after a moderate electrolysis time, and the moderate electrolysis time is determined to be a corrosion resistance time of the coating layer , and compare a slowing resistance value corresponding to the slowing electrolysis time with the preset resistance value to judge the corrosion resistance of the coating layer.

進一步，對該待測物件電解之前，將該標準物件及該導電體皆放進該電解液內，該標準物件及該導電體分別做為該陽極及該陰極，以該三用電表做為該外加電壓進行電解，藉由該三用電表量測該標準物件的電阻值獲得一標準電阻值，該預設電阻值與該標準電阻值正相關。 Further, before the object to be tested is electrolyzed, both the standard object and the conductor are put into the electrolyte, the standard object and the conductor are respectively used as the anode and the cathode, and the three-purpose meter is used as the The applied voltage is electrolyzed, and a standard resistance value is obtained by measuring the resistance value of the standard object by the three-purpose electric meter, and the preset resistance value is positively correlated with the standard resistance value.

進一步，當該和緩電阻值大於該預設電阻值時，該鍍膜層未破壞，當該和緩電阻值小於該預設電阻值時，該鍍膜層已破壞。 Further, when the moderate resistance value is greater than the preset resistance value, the coating layer is not damaged, and when the moderate resistance value is smaller than the preset resistance value, the coating layer is damaged.

進一步，在該電解液的參數固定的情況下，根據該電阻值函數的趨勢，該待測物件的該電阻值越慢趨於該預設電阻值，該鍍膜層耐蝕性的強度越強，該待測物件的該電阻值越快趨於該預設電阻值，該鍍膜層耐蝕性的強度越弱。 Further, under the condition that the parameters of the electrolyte are fixed, according to the trend of the resistance value function, the slower the resistance value of the object to be tested tends to the preset resistance value, the stronger the corrosion resistance of the coating layer, the stronger the corrosion resistance of the coating layer. The faster the resistance value of the object to be tested approaches the preset resistance value, the weaker the corrosion resistance of the coating layer is.

進一步，該電解液的參數能調整，該電解液的參數為該電解液的酸鹼值、濃度及溫度。 Further, the parameters of the electrolyte can be adjusted, and the parameters of the electrolyte are the pH, concentration and temperature of the electrolyte.

進一步，該電解液容置於一電解槽內，該待測物件、該導電體皆放進該電解液內，且對該待側物件進行電解的過程，將該電解槽密封且進行抽氣。 Further, the electrolytic solution is accommodated in an electrolytic cell, the object to be tested and the conductor are put into the electrolytic solution, and the electrolytic cell is sealed and pumped in the process of electrolyzing the object to be side.

進一步，該三用電表的該正極接點並接出多個正極分接點，該等正極分接點分別間隔地多點電性連接該待測物件。 Further, a plurality of positive taps are connected to the positive contact of the three-use electricity meter, and the positive taps are electrically connected to the object to be measured at multiple points at intervals.

進一步，該待測物件在該電解液內平行一斜向方向相對於該導電體斜向設置，該等正極分接點分別沿著該斜向方向間隔地電性連接該待測物件。 Further, the object to be tested is disposed obliquely with respect to the conductor in parallel to an oblique direction in the electrolyte, and the positive tap points are respectively electrically connected to the object to be tested at intervals along the oblique direction.

進一步，藉由該三用電表量測該待測物件在電解過程中多個電解時間所分別對應的多個所述電阻值，根據該等電解時間及對應的該等電阻值獲得一電阻值函數，該電阻值函數即為該等電阻值隨電解時間的變化曲線，在該電阻值函數中，當該電阻值隨時間的變化量小於該預設電阻值的5%，該電阻值對應的該電解時間為一耐蝕時間。 Further, measure a plurality of the resistance values corresponding to a plurality of electrolysis times of the object to be tested in the electrolysis process by the three-use electric meter, and obtain a resistance value according to the electrolysis times and the corresponding resistance values The resistance value function is the change curve of the resistance values with the electrolysis time. In the resistance value function, when the change of the resistance value with time is less than 5% of the preset resistance value, the resistance value corresponds to The electrolysis time is a corrosion resistance time.

根據上述技術特徵可達成以下功效： According to the above technical features, the following effects can be achieved:

1.藉由將該三用電表電性連接該待測物件及該導電體，該待測物件不須限定特定形狀大小，則該待測物件可直接以實體量測，例如產品型態的物件，形狀可複雜且多樣，以與該第一金屬基材的材質相同的該第二金屬基材為對照，比較出該第一金屬基材覆上該鍍膜層後的耐蝕效果，不須特別製作試片，在實行時更便利、更容易實施。 1. By electrically connecting the three-use meter to the object to be measured and the conductor, the object to be measured does not need to be limited to a specific shape and size, and the object to be measured can be directly measured physically, such as the product type. The shape of the object can be complex and diverse. Compared with the second metal substrate of the same material as the first metal substrate, the corrosion resistance effect of the first metal substrate covered with the coating layer is compared. No special It is more convenient and easier to implement when making test pieces.

2.藉由使用該三用電表取代原來昂貴儀器，在實行時降低成本。 2. By using the three-use meter to replace the original expensive instrument, the cost is reduced during implementation.

3.該電解液濃度、溫度和酸鹼值等參數條件，可依模擬腐蝕環境而調整，由於採取相對於該第二金屬基材的耐蝕程度，直觀比較出該鍍膜層的耐蝕性，數據更容易解讀，在閱讀和溝通時更簡淺易懂，也易於生產線品管。 3. The parameters such as the electrolyte concentration, temperature and pH value can be adjusted according to the simulated corrosion environment. Since the corrosion resistance relative to the second metal substrate is adopted, the corrosion resistance of the coating layer can be visually compared, and the data is more accurate. Easy to interpret, easier to understand when reading and communicating, and easy for production line quality control.

4.電解所用電源僅是該三用電表的電池，不需交流電源，便利性更高，該三用電表同時處理電源供應和量測電阻，接線和操作更容易，整組量測系統可隨時移動，無須斷電。 4. The power source used for electrolysis is only the battery of the three-purpose electricity meter, no AC power supply is required, and the convenience is higher. The three-purpose electricity meter handles both power supply and resistance measurement, making wiring and operation easier, and the whole set of measurement system Can be moved at any time without power failure.

5.該三用電表提供穩定的固定電壓輸出，無訊號和突波干擾，能使系統電解反應穩定，量測所得的該電阻值變化小於1%，相較於以交流轉直流的供電方式，該電阻值變化大於2%，數據一直上下跳動，該三用電表量測的數據更穩定。 5. The three-use electric meter provides a stable fixed voltage output, no signal and surge interference, which can stabilize the electrolytic reaction of the system. The measured resistance value changes less than 1%, compared to the AC-to-DC power supply method. , the resistance value changes by more than 2%, the data keeps beating up and down, and the data measured by the three-use meter is more stable.

S01:建立預設電阻值步驟 S01: Steps of establishing a preset resistance value

S02:電解步驟 S02: Electrolysis step

S03:即時量測步驟 S03: Real-time measurement steps

S04:連續量測步驟 S04: Continuous measurement steps

S05:判斷步驟 S05: Judgment step

S06:分析步驟 S06: Analysis step

1:三用電表 1: Three-use meter

2:導電體 2: Conductor

3:電解槽 3: Electrolyzer

4:電解液 4: Electrolyte

5:處理器 5: Processor

10:待測物件 10: Object to be tested

10a:第一待測物件 10a: The first object to be tested

10b:第二待測物件 10b: The second object to be tested

10c:第三待測物件 10c: The third object to be tested

[第一圖]是一流程圖，說明本發明估鍍膜層耐蝕性方法的一第一實施例的流程。 [FIG. 1] is a flow chart illustrating the flow of a first embodiment of the method for estimating the corrosion resistance of a coating layer of the present invention.

[第二圖]是一示意圖，說明該第一實施例的操作示意。 [Second Figure] is a schematic diagram illustrating the operation of the first embodiment.

[第三圖]是一量測圖，說明量測一標準物件的多個電阻值而獲得一標準電阻值函數，量測一第一待測物件、一第二待測物件、一第三待測物件的多個電阻值而獲得各自的一電阻值函數。 [Figure 3] is a measurement diagram, illustrating that a standard resistance value function is obtained by measuring a plurality of resistance values of a standard object, measuring a first object to be measured, a second object to be measured, and a third object to be measured A plurality of resistance values of the object are measured to obtain a respective resistance value function.

[第四圖]是一示意圖，說明本發明估鍍膜層耐蝕性方法的一第二實施例的的操作示意。 [FIG. 4] is a schematic diagram illustrating the operation of a second embodiment of the method for estimating the corrosion resistance of a coating layer of the present invention.

綜合上述技術特徵，本發明評估鍍膜層耐蝕性方法的主要功效將可於下述實施例清楚呈現。 In view of the above technical features, the main effect of the method for evaluating the corrosion resistance of the coating layer of the present invention will be clearly presented in the following examples.

參閱第一圖至第三圖，本發明評估鍍膜層耐蝕性方法的一第一實施例適用於一待測物件10，該待測物件10包括一鍍膜層和一第一金屬基材，該鍍膜層覆蓋該第一金屬基材，該評估鍍膜層耐蝕性方法適用於評估該鍍膜層的耐蝕優劣，尤其是對該第一金屬基材經由一反應性鍍膜而在該第一金屬基材上形成該鍍膜層，評估該鍍膜層的耐蝕優劣，例如該鍍膜層已消失或可能為全面腐蝕、孔腐蝕、晶間腐蝕等等，其中，該反應性鍍膜是使形成該鍍膜層之基材的流體在該第一金屬基材表面發生化學變化，而在該第一金屬基材表面上形成了固體的該鍍膜層，該評估鍍膜層耐蝕性方法也可評估該鍍膜層的耐蝕性強度，在本例中，該第一金屬基材為一銅片，該鍍膜層為一苯并***銅薄膜，該待測物件10為鍍上該苯并***銅薄膜的一銅片，須注意的是該待測物件10不限定大小及形狀，該評估鍍膜層耐蝕性方法可由一三用電表1、一導電體2、一電解槽3、一電解液4及一處理器5實行，該處理器5與該三用電表1電連接以接收該三用電表1量測到的一電阻值，在本例中該導電體2為一銅片，該電解槽3呈長方體且界定一容置空間，該容置空間裝設該電解液4，該電解液4為PH3.2的硫酸銅溶液，該處理器5為一電腦。該評估鍍膜層耐蝕性方法包含一建立預設電阻值步驟S01、一電解步驟S02、一即時量測步驟S03、一連續量測步驟S04、一判斷步驟S05，及一分析步驟S06。 Referring to Figures 1 to 3, a first embodiment of the method for evaluating the corrosion resistance of a coating layer of the present invention is applicable to an object to be tested 10 . The object to be tested 10 includes a coating layer and a first metal substrate. The coating film layer covering the first metal substrate, the method for evaluating the corrosion resistance of the coating layer is suitable for evaluating the corrosion resistance of the coating layer, especially the first metal substrate is formed on the first metal substrate through a reactive coating For the coating layer, evaluate the corrosion resistance of the coating layer, for example, the coating layer has disappeared or may be general corrosion, pitting corrosion, intergranular corrosion, etc., wherein the reactive coating is the fluid that forms the substrate of the coating layer A chemical change occurs on the surface of the first metal substrate, and the solid coating layer is formed on the surface of the first metal substrate. The method for evaluating the corrosion resistance of the coating layer can also evaluate the corrosion resistance strength of the coating layer. In an example, the first metal substrate is a copper sheet, the coating layer is a benzotriazole copper film, and the object to be tested 10 is a copper sheet plated with the benzotriazole copper film. It should be noted that The size and shape of the object to be tested 10 are not limited. The method for evaluating the corrosion resistance of the coating layer can be implemented by a three-use electricity meter 1, a conductor 2, an electrolytic cell 3, an electrolyte 4 and a processor 5. The processor 5 is electrically connected to the three-use electricity meter 1 to receive a resistance value measured by the three-use electricity meter 1. In this example, the conductor 2 is a copper sheet, and the electrolytic cell 3 is a rectangular parallelepiped and defines an accommodation Space, this accommodation space is equipped with this electrolyte 4, and this electrolyte 4 is PH3.2 Copper sulfate solution, the processor 5 is a computer. The method for evaluating the corrosion resistance of the coating layer includes a step S01 of establishing a predetermined resistance value, an electrolysis step S02, a real-time measurement step S03, a continuous measurement step S04, a determination step S05, and an analysis step S06.

建立預設電阻值步驟S01：將一標準物件及該導電體2皆放進該電解液4內，該三用電表1的一正極接點及一負極接點分別電性連接該標準物件及該導電體2，該標準物件及該導電體2分別做為一陽極及一陰極，以該三用電表1做為提供電解所需的一外加電壓進行電解，藉由該三用電表1量測該標準物件在電解過程的該電阻值獲得一標準電阻值，其中，該標準物件類似於該待測物件10未鍍上該鍍膜層的狀態，該標準物件包括一第二金屬基材，該第二金屬基材的材質與該第一金屬基材的材質相同，亦即該標準物件為該銅片，利用該處理器5預設一預設電阻值，該預設電阻值與該標準電阻值正相關。從第三圖顯示，該標準電阻值約為20歐姆，利用該處理器5預設該預設電阻值例如為該標準電阻的1.5倍為30歐姆，該待測物件10的電阻值會隨著該鍍膜層的破壞而下降，例如當該待測物件10的電阻值掉到30歐姆時，該待測物件10的的鍍膜層可能已經有破壞的狀況。進一步，藉由該三用電表1量測該標準物件在電解過程中多個電解時間所分別對應的多個所述標準電阻值，利用該處理器5接收該等標準電阻值，且根據該等電解時間及對應的該等標準電阻值獲得一標準電阻值函數，該標準電阻值函數為該等預設電阻值隨電解時間的變化曲線。從第三圖顯示，該標準電阻值函數的斜率趨近於零，該等標準電阻值皆趨近20歐姆。 Step S01 of establishing a preset resistance value: put a standard object and the conductor 2 into the electrolyte 4, and a positive contact and a negative contact of the three-use electricity meter 1 are respectively electrically connected to the standard object and the The conductor 2, the standard object and the conductor 2 are used as an anode and a cathode respectively, and the three-use electricity meter 1 is used as an applied voltage required for electrolysis to perform electrolysis. Measure the resistance value of the standard object during the electrolysis process to obtain a standard resistance value, wherein the standard object is similar to the state of the object to be tested 10 without the coating layer, the standard object includes a second metal substrate, The material of the second metal substrate is the same as that of the first metal substrate, that is, the standard object is the copper sheet, and the processor 5 is used to preset a predetermined resistance value, and the predetermined resistance value is the same as the standard The resistance value is positively correlated. As shown in the third figure, the standard resistance value is about 20 ohms, and the preset resistance value is preset by the processor 5 to be, for example, 1.5 times the standard resistance value to be 30 ohms, and the resistance value of the object to be tested 10 will vary with Destruction of the coating layer decreases. For example, when the resistance value of the object to be tested 10 drops to 30 ohms, the coating layer of the object to be tested 10 may have been damaged. Further, measure a plurality of the standard resistance values corresponding to a plurality of electrolysis times of the standard object in the electrolysis process by the three-use electricity meter 1, use the processor 5 to receive the standard resistance values, and according to the A standard resistance value function is obtained by equalizing the electrolysis time and the corresponding standard resistance values, and the standard resistance value function is a change curve of the preset resistance values with the electrolysis time. The third graph shows that the slope of the standard resistance value function approaches zero, and the standard resistance values all approach 20 ohms.

電解步驟S02：將該待測物件10及該導電體2皆放進該電解液4內，一樣以該三用電表1做為提供電解所需的該外加電壓進行電解，該三用電表1的該正極接點及該負極接點分別電性連接該待測物件10的第一金屬基材及該導電體2，該待測物件10及該導電體2分別為該陽極及該陰極。在該待測物件10電解過程，該待測物件10的鍍膜層逐漸受到該電解液4的侵蝕而破壞。需補充說明的是，該三用電表1能提供的電壓為9伏特的倍數，已經足夠做為大部分的金屬進行電解時所需的電壓。 Electrolysis step S02: both the object to be tested 10 and the conductor 2 are put into the electrolyte 4, and the three-use electricity meter 1 is used as the applied voltage required for electrolysis to perform electrolysis. The positive contact and the negative contact of 1 are respectively electrically connected to the first metal substrate and the The conductor 2 , the object to be tested 10 and the conductor 2 are the anode and the cathode, respectively. During the electrolysis process of the object to be tested 10 , the coating layer of the object to be tested 10 is gradually eroded by the electrolyte 4 and damaged. It should be added that the voltage that the three-use electricity meter 1 can provide is a multiple of 9 volts, which is enough to be the voltage required for electrolysis of most metals.

即時量測步驟S03：藉由該三用電表1量測該待測物件10在電解過程的該電阻值。若只是即時判斷該待測物件10的鍍膜層是否有破壞，可跳至判斷步驟S05。 Real-time measurement step S03 : measuring the resistance value of the object to be measured 10 during the electrolysis process by using the three-use electricity meter 1 . If it is only to immediately judge whether the coating layer of the object to be tested 10 is damaged, the process can be skipped to the judgment step S05.

連續量測步驟S04：藉由該三用電表1量測該待測物件10在電解過程中多個電解時間所分別對應的多個所述電阻值，利用該處理器5接收該等電阻值且根據該等電解時間及對應的該等電阻值獲得一電阻值函數，該電阻值函數為該等電阻值隨電解時間的變化曲線。從第三圖顯示，三個所述待測物件10的差異為該等待測物件10分別在三種不同鍍膜時間形成不同厚度的該等鍍膜層，為清楚說明，該等待測物件10分別表示為一第一待測物件10a、一第二待測物件10b、一第三待測物件10c，該第一待測物件10a的鍍膜層是由5分鐘的鍍膜時間形成，該第二待測物件10b的鍍膜層是由10分鐘的鍍膜時間形成，該第三待測物件10c的鍍膜層是由15分鐘的鍍膜時間形成，該第一待測物件10a、該第二待測物件10b及該第三待測物件10c在一開始的該等電阻值都比較大，該等電阻值隨著該等電解時間的增加逐漸下降，而該第二待測物件10b的電阻值函數及該第三待測物件10c的電阻值函數的趨勢類似，因此，該待測物件10的鍍膜層可由10分鐘的鍍膜時間形成即可達到最佳化。 Continuous measurement step S04 : measure a plurality of the resistance values corresponding to a plurality of electrolysis times of the object to be measured 10 during the electrolysis process by using the three-use electricity meter 1 , and use the processor 5 to receive the resistance values And according to the electrolysis times and the corresponding resistance values, a resistance value function is obtained, and the resistance value function is a change curve of the resistance values with the electrolysis time. The third figure shows that the difference between the three objects to be tested 10 is that the object to be tested 10 forms the coating layers with different thicknesses at three different coating times respectively. For the sake of clarity, the object to be tested 10 is represented as a A first object to be tested 10a, a second object to be tested 10b, a third object to be tested 10c, the coating layer of the first object to be tested 10a is formed by a coating time of 5 minutes, the second object to be tested 10b The coating layer is formed by a coating time of 10 minutes, the coating layer of the third test object 10c is formed by a coating time of 15 minutes, the first test object 10a, the second test object 10b and the third test object 10b. The resistance values of the test object 10c are relatively large at the beginning, and the resistance values gradually decrease with the increase of the electrolysis time, and the resistance value functions of the second test object 10b and the third test object 10c The trend of the resistance value function is similar. Therefore, the coating layer of the object to be tested 10 can be optimized by forming a coating time of 10 minutes.

判斷步驟S05：利用該處理器5將該電阻值與該預設電阻值比較以判斷該鍍膜層是否已破壞。更進一步，該處理器5判斷該電阻值函數在一和緩電解時間後該電阻值函數的斜率變化小於5%以下，其中，判定該和緩電解時間為該鍍膜層的一耐蝕時間，將該和緩電解時間對應的一和緩電阻值與該預設電阻值比較，以判斷該鍍膜層的耐蝕優劣。例如從第三圖，該等待測物件10在電解過程，在每個時刻的任一電阻值皆大於該預設電阻值，因此可判斷該等待測物件10的鍍膜層未發生破壞的狀況。或是該等待測物件10的該等電阻值函數中的該等和緩電阻值皆大於該預設電阻值，因此這樣可更準確的判斷該等待測物件10的鍍膜層未發生破壞的狀況。另一個判斷方式為，在該電阻值函數中，當該電阻值隨時間的變化量小於該預設電阻值的5%，該電阻值對應的該電解時間也為該耐蝕時間，將該耐蝕時間對應的該電阻值與該預設電阻值比較，也用以判斷該鍍膜層的耐蝕優劣。 Judgment step S05 : using the processor 5 to compare the resistance value with the preset resistance value to determine whether the coating layer has been damaged. Further, the processor 5 determines that the resistance value function is in a moderate The slope change of the resistance value function after the electrolysis time is less than 5%, wherein, it is determined that the moderate electrolysis time is a corrosion resistance time of the coating layer, and a moderate resistance value corresponding to the moderate electrolysis time is compared with the preset resistance value, To judge the corrosion resistance of the coating layer. For example, from the third figure, during the electrolysis process of the object to be tested 10, any resistance value at each moment is greater than the preset resistance value, so it can be determined that the coating layer of the object to be tested 10 is not damaged. Or the moderate resistance values in the resistance value functions of the object to be measured 10 are all greater than the preset resistance value, so it can be more accurately determined that the coating layer of the object to be measured 10 is not damaged. Another judgment method is that, in the resistance value function, when the variation of the resistance value with time is less than 5% of the preset resistance value, the electrolysis time corresponding to the resistance value is also the corrosion resistance time, and the corrosion resistance time The corresponding resistance value is compared with the preset resistance value, which is also used to judge the corrosion resistance of the coating layer.

分析步驟S06：在該電解液4的參數固定的情況下，根據該電阻值函數的趨勢，該待測物件10的該電阻值越慢趨於該預設電阻值，該鍍膜層耐蝕性的強度越強，該待測物件10的該電阻值越快趨於該預設電阻值，該鍍膜層耐蝕性的強度越弱。例如從第三圖，根據該第二待測物件10b的電阻值函數趨勢、該第三待測物件10c的電阻值函數趨勢及該第一待測物件10a的電阻值函數趨勢，該第二待測物件10b的電阻值及該第三待測物件10c的電阻值相較於該第一待測物件10a的電阻值越慢趨於該預設電阻值，則該第二待測物件10b及該第三待測物件10c的該鍍膜層耐蝕性的強度越強。因此，從該電阻值函數的趨勢，可分析出該待測物件10的該鍍膜層耐蝕性的強度。 Analysis step S06: Under the condition that the parameters of the electrolyte 4 are fixed, according to the trend of the resistance value function, the slower the resistance value of the object to be tested 10 tends to the preset resistance value, the stronger the corrosion resistance of the coating layer is. The stronger it is, the faster the resistance value of the object to be tested 10 tends to the predetermined resistance value, and the weaker the corrosion resistance of the coating layer is. For example, from the third graph, according to the trend of the resistance value function of the second object to be tested 10b, the function trend of the resistance value of the third object to be tested 10c and the trend of the function of resistance value of the first object to be tested 10a, the second object to be tested 10a The resistance value of the object to be tested 10b and the resistance value of the third object to be tested 10c tend to be slower than the resistance value of the first object to be tested 10a and tend to the predetermined resistance value, the second object to be tested 10b and the resistance value of the The corrosion resistance of the coating layer of the third object to be tested 10c is stronger. Therefore, from the trend of the resistance value function, the strength of the corrosion resistance of the coating layer of the object to be tested 10 can be analyzed.

需補充說明的是，未讓電解過程不受氣體的干擾，影響判定結果，在該待測物件10、該導電體2皆放進該電解液4內，且對該待側物件10進行電解的過程，將該電解槽3密封且持續進行抽氣，讓電解過程產生的氣體被抽出而不影響電解過程。 It should be added that the electrolysis process is not disturbed by gas, which affects the determination result. The object to be tested 10 and the conductor 2 are all put into the electrolyte 4, and the object 10 to be tested is subjected to In the process of electrolysis, the electrolytic cell 3 is sealed and the gas is continuously pumped, so that the gas generated during the electrolysis process can be extracted without affecting the electrolysis process.

再要補充說明的是，該電解液4的參數能調整，該電解液4的參數為該電解液4的酸鹼值、濃度和溫度等參數，該電解液4的酸鹼值可根據想獲得的該電阻值函數之詳細程度及電解總時間來調整，可以預先設定該電解液的酸鹼值，例如該待測物件10的鍍膜層厚度較厚，或電解需要加速，則可選擇高酸鹼值的該電解液4，反之，若該待測物件10的鍍膜層厚度較薄，或需要較詳細之該電阻值函數，則選擇趨於中性的該電解液4，但電解時間也隨之加長。因此，該電解液的酸鹼值、濃度和溫度等參數條件，可依模擬腐蝕環境而調整。 It should be added that the parameters of the electrolyte 4 can be adjusted, and the parameters of the electrolyte 4 are parameters such as pH, concentration and temperature of the electrolyte 4, and the pH of the electrolyte 4 can be obtained as desired. The degree of detail of the resistance value function and the total electrolysis time can be adjusted, and the pH value of the electrolyte solution can be preset. For example, the thickness of the coating layer of the object to be tested 10 is thick, or the electrolysis needs to be accelerated, a high acid-base value can be selected. On the contrary, if the thickness of the coating layer of the object to be tested 10 is relatively thin, or the resistance value function needs to be more detailed, the electrolyte 4 that tends to be neutral is selected, but the electrolysis time also varies accordingly. lengthened. Therefore, the parameters such as pH value, concentration and temperature of the electrolyte can be adjusted according to the simulated corrosive environment.

因此，在進行評估鍍膜層耐蝕性方法時，該待測物件10、該電解槽3不須限定特定形狀大小，則該待測物件10可直接以實體量測，不須特別製作試片，又使用該三用電表1與該處理器5的配合即可進行實驗，不須特別使用昂貴儀器，又可根據實驗時間、該鍍膜層厚度、分析的詳細程度等因素自行調整該電解液4酸鹼值、濃度及溫度等參數，讓本案評估鍍膜層耐蝕性方法簡單易實施、成本低且便利。 Therefore, when the method for evaluating the corrosion resistance of the coating layer is carried out, the object to be tested 10 and the electrolytic cell 3 do not need to be limited to a specific shape and size, and the object to be tested 10 can be directly measured physically without the need to make a special test piece. The experiment can be carried out by using the combination of the three-use electricity meter 1 and the processor 5, without the need to use expensive instruments, and the electrolyte 4 acid can be adjusted by itself according to factors such as the experiment time, the thickness of the coating layer, and the degree of detail of the analysis. Parameters such as alkali value, concentration and temperature make the method of evaluating the corrosion resistance of the coating layer simple, easy to implement, low cost and convenient.

參閱第一圖及第四圖，本發明評估鍍膜層耐蝕性方法的一第二實施例，與該第一實施例類似，不同處在於在該電解步驟S02中，使用的該電解槽3為一哈氏槽，該哈氏槽的水平切面呈一梯形，該待測物件10放置在該梯形的一斜邊上，該導電體2放置在該梯形相反於該斜邊的一長邊上，因此，該待測物件10在該電解液4內平行一斜向方向相對於該導電體2斜向設置，該三用電表1的該正極接點並接出多個正極分接點，該等正極分接點分別沿著該斜向方向間隔地多點電性連接該待測物件10，則該待測物件10的多個量測點各自形成一所述電阻值函數。則從該等電阻值函數更能全面分析該待測物件10的該鍍膜層耐蝕性的強度。因此在本例中，藉由量測該待測物件10的多個所述量測點，且該等量測點的電流迴路路徑長短不同，更能全面了解該待測物件10的鍍膜層耐蝕性。 Referring to the first and fourth figures, a second embodiment of the method for evaluating the corrosion resistance of a coating layer of the present invention is similar to the first embodiment, except that in the electrolysis step S02, the electrolytic cell 3 used is a Hastelloy slot, the horizontal section of the Hastelloy slot is a trapezoid, the object to be tested 10 is placed on a hypotenuse of the trapezoid, the conductor 2 is placed on a long side of the trapezoid opposite to the hypotenuse, so , the object to be measured 10 is arranged obliquely relative to the conductor 2 in a parallel oblique direction in the electrolyte 4, the positive contact of the three-use meter 1 is connected to a plurality of positive taps, the The positive tap points are respectively electrically connected to the object to be measured 10 at multiple points along the oblique direction, and then a plurality of measurement points of the object to be measured 10 are formed respectively. a function of the resistance value. Then, the corrosion resistance strength of the coating layer of the object to be tested 10 can be more comprehensively analyzed from the resistance value functions. Therefore, in this example, by measuring a plurality of the measurement points of the object to be tested 10, and the lengths of the current loop paths of the measurement points are different, the corrosion resistance of the coating layer of the object to be tested 10 can be fully understood. sex.

綜上所述，藉由將該三用電表1電性連接該待測物件10及該導電體2，該待測物件10不須限定特定形狀大小，則該待測物件10可直接以實體量測，不須特別製作試片，又藉由使用該三用電表1取代原來昂貴儀器，又該電解液4的參數可根據需求自行調整，讓本案更便利、更容易實施，且成本更低。 To sum up, by electrically connecting the three-use meter 1 to the object to be measured 10 and the conductor 2, the object to be measured 10 does not need to be limited to a specific shape and size, and the object to be measured 10 can be directly For measurement, there is no need to make a special test piece, and by using the three-use electricity meter 1 to replace the original expensive instrument, and the parameters of the electrolyte 4 can be adjusted according to the needs, making the case more convenient and easier to implement, and the cost is lower. Low.

綜合上述實施例之說明，當可充分瞭解本發明之操作、使用及本發明產生之功效，惟以上所述實施例僅係為本發明之較佳實施例，當不能以此限定本發明實施之範圍，即依本發明申請專利範圍及發明說明內容所作簡單的等效變化與修飾，皆屬本發明涵蓋之範圍內。 Based on the descriptions of the above embodiments, one can fully understand the operation, use and effects of the present invention, but the above-mentioned embodiments are only preferred embodiments of the present invention, which should not limit the implementation of the present invention. Scope, that is, simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the description of the invention, all fall within the scope of the present invention.

1:三用電表 1: Three-use meter

2:導電體 2: Conductor

3:電解槽 3: Electrolyzer

4:電解液 4: Electrolyte

5:處理器 5: Processor

10:待測物件 10: Object to be tested

Claims

一種評估鍍膜層耐蝕性方法，適用於一待測物件，該待測物件包括一鍍膜層和一第一金屬基材，該鍍膜層覆蓋該第一金屬基材，該評估鍍膜層耐蝕性方法包含：將該待測物件及一導電體皆放進一電解液內，以一三用電表做為提供電解所需的一外加電壓進行電解，其中該外加電壓為9伏特的倍數，該三用電表的一正極接點及一負極接點分別電性連接該待測物件之第一金屬基材及該導電體，該待測物件及該導電體分別為一陽極及一陰極；藉由該三用電表量測該待測物件在電解過程的一電阻值；及比較該電阻值與一預設電阻值的大小，及比較多個所述電阻值隨電解時間的變化曲線與多個所述預設電阻值隨電解時間的變化曲線，以判斷該鍍膜層的耐蝕優劣，其中，該預設電阻值與一標準物件的電阻值正相關，該標準物件包括一第二金屬基材，該第二金屬基材的材質與該第一金屬基材的材質相同；其中，對該待測物件電解之前，將該標準物件及該導電體皆放進該電解液內，該標準物件及該導電體分別做為該陽極及該陰極，以該三用電表做為該外加電壓進行電解，藉由該三用電表量測該標準物件的電阻值獲得一標準電阻值，該預設電阻值與該標準電阻值正相關。 A method for evaluating the corrosion resistance of a coating layer, which is suitable for an object to be tested, the object to be tested includes a coating layer and a first metal substrate, the coating layer covers the first metal substrate, and the method for evaluating the corrosion resistance of the coating layer comprises: : Put the object to be tested and a conductor into an electrolyte, and perform electrolysis with a three-use electricity meter as an applied voltage required for electrolysis, wherein the applied voltage is a multiple of 9 volts, and the three-use electricity A positive contact and a negative contact of the watch are respectively electrically connected to the first metal substrate of the object to be tested and the conductor, and the object to be tested and the conductor are an anode and a cathode respectively; Measure a resistance value of the object to be tested during the electrolysis process with an electric meter; and compare the resistance value with a preset resistance value, and compare the change curves of the resistance values with the electrolysis time with the plurality of the resistance values. The change curve of the preset resistance value with the electrolysis time is used to judge the corrosion resistance of the coating layer, wherein the preset resistance value is positively correlated with the resistance value of a standard object, and the standard object includes a second metal substrate, the first The material of the second metal substrate is the same as that of the first metal substrate; wherein, before the object to be tested is electrolyzed, both the standard object and the conductor are put into the electrolyte, the standard object and the conductor are As the anode and the cathode respectively, electrolysis is carried out with the three-purpose electricity meter as the applied voltage, and a standard resistance value is obtained by measuring the resistance value of the standard object by the three-purpose electricity meter, and the preset resistance value is the same as the This standard resistance value is positively correlated.

如請求項1所述之評估鍍膜層耐蝕性方法，其中，藉由該三用電表量測該待測物件在電解過程中多個電解時間所分別對應的多個所述電阻值，根據該等電解時間及對應的該等電阻值獲得一電阻值函數，該電阻值函數即為該等電阻值隨電解時間的變化曲線，該電阻值函數的斜率變化在一和緩電解時間後小於5%以下，判定該和緩電解時間為該鍍膜層的一耐蝕時間，將該和緩電解時間對應的一和緩電阻值與該預設電阻值比較，以判斷該鍍膜層的耐蝕優劣。 The method for evaluating the corrosion resistance of a coating layer as claimed in claim 1, wherein the resistance values corresponding to the electrolysis times of the object to be tested during the electrolysis process are measured by the three-meter electric meter, and according to the Equivalent electrolysis time and the corresponding resistance values to obtain a resistance value function, the resistance value function is the change curve of the resistance values with the electrolysis time, and the slope of the resistance value function changes during a gentle electrolysis After the time is less than 5%, it is determined that the moderate electrolysis time is a corrosion resistance time of the coating layer, and a moderate resistance value corresponding to the moderate electrolysis time is compared with the preset resistance value to judge the corrosion resistance of the coating layer.

如請求項2所述之評估鍍膜層耐蝕性方法，其中，當該和緩電阻值大於該預設電阻值時，該鍍膜層未破壞，當該和緩電阻值小於該預設電阻值時，該鍍膜層已破壞。 The method for evaluating the corrosion resistance of a coating layer according to claim 2, wherein when the moderate resistance value is greater than the preset resistance value, the coating layer is not damaged, and when the moderate resistance value is less than the preset resistance value, the coating layer Layer is destroyed.

如請求項2所述之評估鍍膜層耐蝕性方法，其中，在該電解液的參數固定的情況下，根據該電阻值函數的趨勢，該待測物件的該電阻值越慢趨於該預設電阻值，該鍍膜層耐蝕性的強度越強，該待測物件的該電阻值越快趨於該預設電阻值，該鍍膜層耐蝕性的強度越弱。 The method for evaluating the corrosion resistance of a coating layer as described in claim 2, wherein, when the parameters of the electrolyte are fixed, according to the trend of the resistance value function, the slower the resistance value of the object to be tested tends to the preset value The resistance value, the stronger the corrosion resistance of the coating layer, the faster the resistance value of the object to be tested tends to the preset resistance value, and the weaker the corrosion resistance of the coating layer.

如請求項1所述之評估鍍膜層耐蝕性方法，其中，該電解液的參數能調整，該電解液的參數為該電解液的酸鹼值、濃度及溫度。 The method for evaluating the corrosion resistance of a coating layer according to claim 1, wherein the parameters of the electrolyte can be adjusted, and the parameters of the electrolyte are the pH, concentration and temperature of the electrolyte.

如請求項1所述之評估鍍膜層耐蝕性方法，其中，該電解液容置於一電解槽內，該待測物件、該導電體皆放進該電解液內，且對該待側物件進行電解的過程，將該電解槽密封且進行抽氣。 The method for evaluating the corrosion resistance of a coating layer as claimed in claim 1, wherein the electrolyte is contained in an electrolytic cell, the object to be tested and the conductor are both placed in the electrolyte, and the object to be tested is subjected to During the electrolysis process, the electrolytic cell is sealed and pumped.

如請求項1所述之評估鍍膜層耐蝕性方法，其中，該三用電表的該正極接點並接出多個正極分接點，該等正極分接點分別間隔地多點電性連接該待測物件。 The method for evaluating the corrosion resistance of a coating layer as set forth in claim 1, wherein the positive terminal of the three-use meter is connected to a plurality of positive taps, and the positive taps are electrically connected at multiple points at intervals. the object to be tested.

如請求項7所述之評估鍍膜層耐蝕性方法，其中，該待測物件在該電解液內平行一斜向方向相對於該導電體斜向設置，該等正極分接點分別沿著該斜向方向間隔地電性連接該待測物件。 The method for evaluating the corrosion resistance of a coating layer as claimed in claim 7, wherein the object to be tested is arranged obliquely with respect to the conductor in parallel to an oblique direction in the electrolyte, and the positive tap points are respectively along the oblique direction. The object to be tested is electrically connected at intervals in the direction.

如請求項1所述之評估鍍膜層耐蝕性方法，其中，藉由該三用電表量測該待測物件在電解過程中多個電解時間所分別對應的多個所述電阻值，根據該等電解時間及對應的該等電阻值獲得一電阻值函數，該電阻值函數即為該等電阻值隨電解時間的變化曲線，在該電阻值函數中，當該電阻值隨時間的變化量小於該預設電阻值的5%，該電阻值對應的該電解時間為一耐蝕時間。 The method for evaluating the corrosion resistance of a coating layer according to claim 1, wherein a plurality of the resistance values corresponding to a plurality of electrolysis times of the object to be tested during the electrolysis process are measured by the three-meter electric meter, A resistance value function is obtained according to the electrolysis times and the corresponding resistance values, and the resistance value function is the change curve of the resistance values with the electrolysis time. In the resistance value function, when the resistance value changes with time The amount is less than 5% of the preset resistance value, and the electrolysis time corresponding to the resistance value is a corrosion resistance time.