CN104458548A - Method for detecting oxidation corrosion resistance of vacuum plating rose gold coating and plating layer - Google Patents
Method for detecting oxidation corrosion resistance of vacuum plating rose gold coating and plating layer Download PDFInfo
- Publication number
- CN104458548A CN104458548A CN201410348820.XA CN201410348820A CN104458548A CN 104458548 A CN104458548 A CN 104458548A CN 201410348820 A CN201410348820 A CN 201410348820A CN 104458548 A CN104458548 A CN 104458548A
- Authority
- CN
- China
- Prior art keywords
- coated layer
- rose gold
- vacuum deposition
- sample
- gold coated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a method for detecting oxidation corrosion resistance of a vacuum plating rose gold coating and plating layer. The method comprises the following steps: (1) adding a suitable amount of dilute nitric acid solution with the mass percent of 8%-15% into a testing container; (2) suspending a specimen above the solution level of the dilute nitric acid solution in the testing container, and then sealing the opening of the testing container; (3) putting the sealed testing container into a closed container, adjusting the temperature of the closed container to be 35-40 DEG C, and keeping the temperature constant for 1-2 hours; and (4) after the step (3), taking out a specimen, washing clearly by water, and observing the coating of the specimen. The method for detecting the oxidation corrosion resistance of the vacuum plating rose gold coating and plating layer can be used for detecting the oxidation corrosion resistance of the vacuum plating rose gold coating and plating layer by utilizing the redox reaction of nitric acid (HNO3) and copper (Cu) in the vacuum plating rose gold coating and plating layer, and can detect the true oxidation corrosion resistance of the rose gold coating and plating layer in actual application rapidly, simply and conveniently.
Description
Technical field
The present invention relates to detection method, particularly relate to a kind of Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance.
Background technology
At ornaments with in billon series, rose gold (Rose Gold is called for short RG) the magnificent elegance of Yin Seze, becomes the trend fashion being popular for the outer clock and watch of Now Domestic, jewellery industry.Electroplated rose golden cladding material is also subject to liking of consumers in general.Tradition water Gold-plating technique because there is serious problem of environmental pollution, gradually replace by vacuum metallizing technology.Vacuum Deposition technology not only environmental friendliness, and the coating purity adopting this technology to prepare is high, thickness is homogeneous, compactness and good with basal body binding force.
The existing detection experiment to Vacuum Deposition rose gold coated layer corrosive nature mainly contains neutral salt spray test and artificial perspiration's corrosion test two kinds, and the standard of execution is ISO-3160-2-2003 (E).And Vacuum Deposition rose gold coated layer nearly all is now all by the neutral salt spray test (as shown in Figure 1) of ISO-3160-2-2003 (E) and the standard-required (as shown in Figure 2) of artificial perspiration's corrosion test, but still there is serious oxidation corrosion discoloration problem (as shown in Figure 3) in actual applications by the Vacuum Deposition rose gold coated layer of these two testing experiment standards.Therefore, invent and a kind ofly truly can detect that the detection method of Vacuum Deposition rose gold coated layer antioxidant anticorrosive performance in actual applications just seems very urgent and necessary.
Summary of the invention
For above-mentioned prior art present situation, technical matters to be solved by this invention is, a kind of Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance is provided, it can detect Vacuum Deposition rose gold coated layer oxidation corrosion performance in actual use fast, truly, for the progress of Vacuum Deposition rose gold technology provides true and reliable test figure with perfect.
In order to solve the problems of the technologies described above, a kind of Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance provided by the present invention, described coated layer contains Au and Cu, and described detection method comprises the steps:
(1) in test container, the dilute nitric acid solution that appropriate massfraction is 8% ~ 15% is added;
(2) sample is hung on the top of the described dilute nitric acid solution liquid level in described test container, then the opening of described test container is sealed;
(3) the described test container after sealing is put into closed container, the temperature regulating closed container is 35 ~ 40 DEG C, constant temperature 1 ~ 2 hour at this temperature;
(4) after step (3), take out sample, after rinsing well with water, observe sample coating.
Wherein in an embodiment, in step (1), the volume of the described dilute nitric acid solution in described test container is greater than 100ml.
Wherein in an embodiment, in step (1), described test container is beaker.
Wherein in an embodiment, in step (2), the distance of the described dilute nitric acid solution liquid level in described sample and described test container is greater than 30mm.
Wherein in an embodiment, in step (2), described sample is hung in described test container by bungee and glass bar.
Wherein in an embodiment, in step (2), the opening of described test container is by plastic sheeting and bungee sealing.
Wherein in an embodiment, in step (3), constant temperature time is 2 hours.
Wherein in an embodiment, in step (3), described closed container is accurate baking oven.
Wherein in an embodiment, before described Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance also comprises the determination test be arranged at before described step (2) the Lab value of sample step, be arranged at after described step (4) determination test after the step of Lab value of sample and the step according to the forward and backward Lab value calculating value of chromatism of test.
Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance of the present invention, utilizes nitric acid (HNO
3) with the redox reaction of copper (Cu) in Vacuum Deposition rose gold coated layer, realize the detection to the antioxidant anticorrosive performance of Vacuum Deposition rose gold coated layer, this detection method can detect rose gold coated layer real antioxidant anticorrosive performance in actual applications, and fast, easy.
The beneficial effect that additional technical feature of the present invention has will be described in this instructions embodiment part.
Accompanying drawing explanation
Fig. 1 be through (a) before 48h neutral salt spray test, after the Vacuum Deposition conventional rose gold coated layer pattern of (b);
Fig. 2 be through (a) before 48h artificial perspiration corrosion test, after the Vacuum Deposition conventional rose gold coated layer pattern of (b);
Fig. 3 is because of the Vacuum Deposition of oxidation stain conventional rose gold coated layer pattern in actual use procedure;
Fig. 4 is the coated layer pattern of sample after antioxidant anticorrosive test of the embodiment of the present invention one;
Fig. 5 is the coated layer pattern of sample after antioxidant anticorrosive test of the embodiment of the present invention two.
Embodiment
And the present invention is described in detail in conjunction with the embodiments below with reference to the accompanying drawings.It should be noted that, when not conflicting, the feature in following embodiment and embodiment can combine mutually.
Discovery is studied through the present inventor, the coated layer of Vacuum Deposition rose gold coated layer goods (wrist-watch annex, pieces of ornament accessories etc. as Vacuum Deposition rose gold coated layer) is mainly containing Au and Cu, the oxidation corrosion performance of this coated layer is mainly relevant with the homogeneity of the content of Cu in coated layer and the phase melting range degree of Cu and the Au technology of Vacuum Deposition rose gold coated layer (namely with), therefore can utilize the redox reaction of copper (Cu) in oxygenant and Vacuum Deposition rose gold coated layer, realize the detection to Vacuum Deposition rose gold coated layer antioxidant anticorrosive performance.But the kind of oxygenant is more, under contrast test effect, financial cost and the prerequisite with reference to invention design concept, have finally chosen and there is better oxidisability and volatile HNO
3as the oxygenant of this detection method.
The concrete steps of Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance of the present invention are as follows:
Add the dilute nitric acid solution that massfraction is 8% ~ 15% in step (1), test container, test container is preferably beaker.If HNO
3solution concentration is too high, highly volatile, and acid mist is dense, and oxidation corrosion is extremely strong, easily causes larger corrosion failure to testing equipment (precision high temperature baking oven), and uses the HNO of high concentration
3carry out antioxidant anticorrosive performance test, the poor stability of test, easily produces test incident; But, if HNO
3solution concentration is too low, and oxidisability is more weak, and test period is long, inefficiency.Through lot of experiments.The present invention determines HNO
3solution concentration is 8% ~ 15% (massfraction), under this concentration conditions, and HNO
3solution oxide is moderate, test period is 1-2h, 2h Oxidation Resistance Test can be born at the moderate novel 5N look rose gold coated layer of not oxidation stain in 1 year that keeps of actual wear, and wear and use the conventional rose gold coated layer of 2-3 month can not bear 2h Oxidation Resistance Test.
Step (2), sample is hung on the top of the described dilute nitric acid solution liquid level in described test container, then the opening of described test container is sealed.Test finds, sample is immersed in dilute nitric acid solution can not oxidation corrosion, therefore sample is suspended on the top of dilute nitric acid solution liquid level, utilizes dust technology and the specimen reaction of volatilization, meanwhile, the sealing of the opening of test container is formed the atmosphere of oxidisability.
Step (3), the described test container after sealing is put into closed container, regulate the temperature of closed container to be 35 ~ 40 DEG C, constant temperature 1 ~ 2 hour at this temperature.Actual wear temperature because of Vacuum Deposition rose gold coating product is room temperature, maximum temperature can not more than 40 DEG C, in addition the temperature of artificial perspiration's corrosion test is 40 DEG C, and Yin Wendu test period on the low side is long, inefficiency, and temperature is too high, experimental safe is bad, therefore the test temperature of detection method is defined as 35 ~ 40 DEG C.Through test, under afore-mentioned test condition, test through oxidation corrosion in 1 hour, keep not oxidation stain in 1 year actual wear is moderate, and if constant temperature time more than 2 hours, the sample of the overwhelming majority all can corrode, therefore, in order to consider to test effect, constant temperature time is defined as 1 ~ 2 hour.
After step (4), step (3), take out sample, after rinsing well with water, observe sample coating.The effective coating of sample without variable color, foaming, peeling, the bad phenomenon such as to peel off, then it is qualified to be considered as.
Below in conjunction with embodiment, the invention will be further described, it should be noted that, embodiment does not form the restriction to application claims protection domain.
Embodiment one
(1) sample
Sample in the present embodiment is that the conventional rose golden wrist-watch of Vacuum Deposition overlaps, and its Coating layer thickness is respectively 0.20 μm (in industry usual thickness standard) and 0.40 μm (in industry the highest thickness calibration).
(2) test procedure
Step 1., the preparation of the dilute nitric acid solution of 8% ~ 15%: the red fuming nitric acid (RFNA) (massfraction is 60% ~ 69%) measuring 15 ~ 20ml with graduated cylinder or measuring cup is in a clean beaker (500ml) (should add appropriate amount of deionized water or distilled water (about 50ml) in beaker in advance), again with deionized water or distilled water diluting to beaker 100ml scale mark, for subsequent use after ultrasonic 5min.
Step 2., hang in beaker by sample bungee and glass bar, is greater than 30mm place apart from liquid level, then is sealed by beaker mouth with plastic sheeting and bungee.
3., by the beaker after sealing step puts into accurate baking oven, regulates oven temperature to 35 DEG C, constant temperature 2h;
Step 4., afterwards, is taken out sample, and is used tap water.After rinsing well, observing sample coating has non-oxidation to peel and variable color, then uses hand wiping sample coating, observes the change of sample coating.
(3) test findings
The conventional rose gold of Vacuum Deposition is enclosed within after 2h antioxidant anticorrosive performance test, with in the process of tap water, the flaking of rose gold coated layer, oxidation corrosion is serious, bottom class rose layer gold is also oxidized to dark yellow, after hand wiping coated layer, coated layer comes off further (as shown in Figure 4), and this sample is defective.And adopt the wrist-watch of this rose gold coated layer, oxidation corrosion Coloring Time in actual wear uses is 2 ~ 4 months (as shown in Figure 3), and its erosion profile and this antioxidant anticorrosive test after pattern basically identical, therefore testing result is consistent with actual conditions.
Embodiment two
(1) sample
Sample is that Vacuum Deposition novel 5N rose golden wrist-watch overlaps, and its Coating layer thickness is respectively 0.10 μm and 0.20 μm.
(2) test procedure
Step 1., the preparation of the dilute nitric acid solution of 8% ~ 15%: the red fuming nitric acid (RFNA) (massfraction is 60% ~ 69%) measuring 15 ~ 20ml with graduated cylinder or measuring cup is in a clean beaker (500ml) (should add appropriate amount of deionized water or distilled water (about 50ml) in beaker in advance), again with deionized water or distilled water diluting to beaker 100ml scale mark, for subsequent use after ultrasonic 5min.
Step 2., hang in beaker by sample bungee and glass bar, is greater than 30mm place apart from liquid level, then is sealed by beaker mouth with plastic sheeting and bungee;
3., by the beaker after sealing step puts into accurate baking oven, regulates oven temperature to 40 DEG C, constant temperature 2h;
Step 4., afterwards, is taken out sample, and is used tap water.After rinsing well, observing sample coating has non-oxidation to peel and variable color, then uses hand wiping sample coating, observes the change of sample coating.
(3) test findings
The novel 5N rose gold of Vacuum Deposition is enclosed within after 2h antioxidant anticorrosive performance test, come off without variable color and coated layer, with in the process of tap water, rose gold coated layer Cheng Yiwu comes off, the situation of the effective coated layer No oxidation corrosion of sample occurs, after hand wiping coated layer, the situation that effective coated layer still comes off without coated layer occurs, and this sample is defective.Adopt the wrist-watch of this rose gold coated layer, after actual wear uses 8 months, still occur without obvious oxidation corrosion discoloration, therefore testing result is consistent with actual conditions.
Embodiment three
(1) sample
Sample is Vacuum Deposition novel 5N rose golden stainless steel substrates (1.2mm × 25mm × 60mm) coated layer thickness is 0.20 μm.
(2) test procedure
Step 1., adopt CM-700d type spectrophotometric color measurement instrument (Japanese Konica Minolta) to measure the brightness value (L*) of Vacuum Deposition 5N rose gold coated layer color, green angle value (a*) and champac chromatic value (b*).
Step 2., the preparation of the dilute nitric acid solution of 8% ~ 15%: the red fuming nitric acid (RFNA) (massfraction is 60% ~ 69%) measuring 15 ~ 20ml with graduated cylinder or measuring cup is in a clean beaker (500ml) (should add appropriate amount of deionized water or distilled water (about 50ml) in beaker in advance), again with deionized water or distilled water diluting to beaker 100ml scale mark, for subsequent use after ultrasonic 5min.
Step 3., hang in beaker by sample bungee and glass bar, is greater than 30mm place apart from liquid level, then is sealed by beaker mouth with plastic sheeting and bungee;
4., by the beaker after sealing step puts into accurate baking oven, regulates oven temperature to 35 ~ 40 DEG C, constant temperature 2h;
Step 5., afterwards, is taken out sample, and is used tap water.After rinsing well, observing sample coating has non-oxidation to peel and variable color, then uses hand wiping sample coating, observes the change of sample coating.
Step 6., adopt CM-700d type spectrophotometric color measurement instrument (Japanese Konica Minolta) to measure the brightness value (L*) of Vacuum Deposition 5N rose gold coated layer color after 2h Oxidation Resistance Test, green angle value (a*) and champac chromatic value (b*), and with test before compare.
(3) test findings
1. Vacuum Deposition novel 5N rose gold coated layer is after 2h antioxidant anticorrosive performance test, come off without variable color and coated layer, with in the process of tap water, rose gold coated layer Cheng Yiwu comes off, the situation of the effective coated layer No oxidation corrosion of sample occurs, after hand wiping coated layer, the situation that effective coated layer still comes off without coated layer occurs, and this sample is qualified.
2. as shown in table 1, the novel 5N rose gold of the Vacuum Deposition after 2h Oxidation Resistance Test coated layer color is without significant change.Its value of chromatism
calculate by formula (1).
As known from Table 1, the difference of this Vacuum Deposition novel 5N rose gold coated layer color L*, a*, b* before and after 2h antioxidant anticorrosive performance test is respectively 0.16 ,-0.04 and-0.98, value of chromatism
for 0.98NBS (aberration unit).According to the criterion of NBS, value of chromatism is when 0.5 ~ 1.5NBS, and sensation aberration degree is slight, namely tests front and back rose gold coated layer without obvious aberration through 2h antioxidant anticorrosive.
The situation of change of the Vacuum Deposition novel 5N rose gold coated layer color L*a*b* value of table 1 before and after the test of 2h antioxidant anticorrosive
To sum up, by Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance of the present invention, achieve the detection of the antioxidant anticorrosive performance to Vacuum Deposition rose gold coated layer, this detection method can detect rose gold coated layer real antioxidant anticorrosive performance in actual applications, and fast, easy.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (9)
1. a Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance, described coated layer contains Au and Cu, it is characterized in that, described detection method comprises the steps:
(1) in test container, the dilute nitric acid solution that appropriate massfraction is 8% ~ 15% is added;
(2) sample is hung on the top of the described dilute nitric acid solution liquid level in described test container, then the opening of described test container is sealed;
(3) the described test container after sealing is put into closed container, the temperature regulating closed container is 35 ~ 40 DEG C, constant temperature 1 ~ 2 hour at this temperature;
(4) after step (3), take out sample, after rinsing well with water, observe sample coating.
2. Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance according to claim 1, it is characterized in that, in step (1), the volume of the described dilute nitric acid solution in described test container is greater than 100ml.
3. Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance according to claim 1, it is characterized in that, in step (1), described test container is beaker.
4. Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance according to claim 1, is characterized in that, in step (2), the distance of the described dilute nitric acid solution liquid level in described sample and described test container is greater than 30mm.
5. Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance according to claim 1, it is characterized in that, in step (2), described sample is hung in described test container by bungee and glass bar.
6. Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance according to claim 1, is characterized in that, in step (2), the opening of described test container is by plastic sheeting and bungee sealing.
7. Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance according to claim 1, it is characterized in that, in step (3), constant temperature time is 2 hours.
8. Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance according to claim 1, it is characterized in that, in step (3), described closed container is accurate baking oven.
9. Vacuum Deposition rose gold coated layer antioxidant anticorrosive method for testing performance as claimed in any of claims 1 to 8, it is characterized in that, before also comprising the determination test be arranged at before described step (2) the Lab value of sample step, be arranged at after described step (4) determination test after the step of Lab value of sample and the step according to the forward and backward Lab value calculating value of chromatism of test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348820.XA CN104458548B (en) | 2014-07-21 | 2014-07-21 | Method for detecting oxidation corrosion resistance of vacuum plating rose gold coating and plating layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348820.XA CN104458548B (en) | 2014-07-21 | 2014-07-21 | Method for detecting oxidation corrosion resistance of vacuum plating rose gold coating and plating layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104458548A true CN104458548A (en) | 2015-03-25 |
| CN104458548B CN104458548B (en) | 2017-04-26 |
Family
ID=52904959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410348820.XA Active CN104458548B (en) | 2014-07-21 | 2014-07-21 | Method for detecting oxidation corrosion resistance of vacuum plating rose gold coating and plating layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104458548B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282959A (en) * | 2016-08-12 | 2017-01-04 | 创隆实业(深圳)有限公司 | A kind of rose gold aftertreatment technology |
| CN107014742A (en) * | 2017-04-14 | 2017-08-04 | 利郎(中国)有限公司 | A kind of decay resistance detection method of metal zip fastener |
| CN107621437A (en) * | 2017-09-07 | 2018-01-23 | 珠海罗西尼表业有限公司 | The detection method of the decay resistance of indicator |
| CN109668958A (en) * | 2018-12-10 | 2019-04-23 | 江苏天鹏电源有限公司 | Wall coating detection method in a kind of li battery shell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201780254U (en) * | 2010-07-21 | 2011-03-30 | 上海梅山钢铁股份有限公司 | Sulfuric acid dew point corrosion resisting tester |
| CN102116730A (en) * | 2010-12-09 | 2011-07-06 | 中兴通讯股份有限公司 | Method for testing porosity of electric connector gold-plating layer |
| CN103207139A (en) * | 2012-01-12 | 2013-07-17 | 中兴通讯股份有限公司 | Method for testing corrosion resistance of NCVM coating |
| CN103645187A (en) * | 2013-12-31 | 2014-03-19 | 广州天至环保科技有限公司 | Test reagent for realizing online rapid nondestructive test of quality of gold plating layer and using method of test reagent |
-
2014
- 2014-07-21 CN CN201410348820.XA patent/CN104458548B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201780254U (en) * | 2010-07-21 | 2011-03-30 | 上海梅山钢铁股份有限公司 | Sulfuric acid dew point corrosion resisting tester |
| CN102116730A (en) * | 2010-12-09 | 2011-07-06 | 中兴通讯股份有限公司 | Method for testing porosity of electric connector gold-plating layer |
| CN103207139A (en) * | 2012-01-12 | 2013-07-17 | 中兴通讯股份有限公司 | Method for testing corrosion resistance of NCVM coating |
| CN103645187A (en) * | 2013-12-31 | 2014-03-19 | 广州天至环保科技有限公司 | Test reagent for realizing online rapid nondestructive test of quality of gold plating layer and using method of test reagent |
Non-Patent Citations (1)
| Title |
|---|
| 机械工业表面覆盖层产品质量监督检测中心: "《GB/T 19351-2003 金属覆盖层 金属基体上金覆盖层 孔隙率的测定 硝酸蒸汽试验》", 31 December 2003 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282959A (en) * | 2016-08-12 | 2017-01-04 | 创隆实业(深圳)有限公司 | A kind of rose gold aftertreatment technology |
| CN107014742A (en) * | 2017-04-14 | 2017-08-04 | 利郎(中国)有限公司 | A kind of decay resistance detection method of metal zip fastener |
| CN107621437A (en) * | 2017-09-07 | 2018-01-23 | 珠海罗西尼表业有限公司 | The detection method of the decay resistance of indicator |
| CN107621437B (en) * | 2017-09-07 | 2019-11-29 | 珠海罗西尼表业有限公司 | The detection method of the corrosion resistance of indicator |
| CN109668958A (en) * | 2018-12-10 | 2019-04-23 | 江苏天鹏电源有限公司 | Wall coating detection method in a kind of li battery shell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104458548B (en) | 2017-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104458548A (en) | Method for detecting oxidation corrosion resistance of vacuum plating rose gold coating and plating layer | |
| Williams et al. | Chromate inhibition of corrosion-driven organic coating delamination studied using a scanning Kelvin probe technique | |
| Wang et al. | XPS and ToF-SIMS investigation of native oxides and passive films formed on nickel alloys containing chromium and molybdenum | |
| CN102747402B (en) | A kind of method of titanium or the colouring of titanium alloy discharge oxidation | |
| CN108179420A (en) | A kind of carbon steel and austenite stainless steel composite material microscopic structure corrosive agent and caustic solution | |
| Kim et al. | Effects of the solution temperature and the pH on the electrochemical properties of the surface oxide films formed on Alloy 600 | |
| Elsen et al. | Effects of electrodeposition conditions and protocol on the properties of iridium oxide pH sensor electrodes | |
| CN104893728B (en) | A kind of etching solution of the low-tension for ITO/Ag/ITO film | |
| Yamamoto et al. | Influence of substrate dislocation on passivation of pure iron in pH 8.4 borate buffer solution | |
| CN102747350B (en) | Gold, silver coating surface protective agent | |
| JP2009198326A (en) | Hexavalent chromium simplified determination method | |
| Liu et al. | Effects of temperature and sulfate on the pitting corrosion of titanium in high-temperature chloride solutions | |
| CN103255403B (en) | Non-chrome black passivator | |
| CN103993303A (en) | Trivalent-chromium anticorrosive passivating solution of aluminium and aluminium alloy | |
| Leimbach et al. | Relation between color and surface morphology of electrodeposited chromium for decorative applications | |
| Huang et al. | The effects of cyclic isothermal oxidation on Ir/IrOx pH electrode and a method to correct the potential drift of metal oxide electrode | |
| Homazava et al. | Element-specific in situ corrosion behavior of Zr–Cu–Ni–Al–Nb bulk metallic glass in acidic media studied using a novel microcapillary flow injection inductively coupled plasma mass spectrometry technique | |
| CN101493395B (en) | Method for measuring rhodium content in plating liquid | |
| Ura-Binczyk et al. | Passive oxide film characterisation on Al-Cr-Fe and Al-Cu-Fe-Cr complex metallic alloys in neutral to alkaline electrolytes by photo-and electrochemical methods | |
| CN102393345B (en) | Analytical method of aluminium alloy micro-arc oxidation silicate electrolyte | |
| CN109323913A (en) | The measuring method of tin the amount of migration in tin food containers tool | |
| CN107621437B (en) | The detection method of the corrosion resistance of indicator | |
| Yun et al. | Enhanced electrochromic properties of Ir–Ta oxide grown using a cosputtering system | |
| Li et al. | Determination of cadmium in tableware leach solution by spectrophotometry using 2, 6-dimethylphenyldiazoaminobenzene | |
| Lin et al. | Adsorption and desorption studies of glycine and benzotriazole during Cu oxidation in a chemical mechanical polishing bath |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |