JPH08294672A - Highly corrosionproof steel product and production thereof - Google Patents

Highly corrosionproof steel product and production thereof

Info

Publication number
JPH08294672A
JPH08294672A JP12712595A JP12712595A JPH08294672A JP H08294672 A JPH08294672 A JP H08294672A JP 12712595 A JP12712595 A JP 12712595A JP 12712595 A JP12712595 A JP 12712595A JP H08294672 A JPH08294672 A JP H08294672A
Authority
JP
Japan
Prior art keywords
steel product
weight
coating
parts
pts
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.)
Pending
Application number
JP12712595A
Other languages
Japanese (ja)
Inventor
あゆみ ▲高▼田
Ayumi Takada
Tetsuya Hirota
哲也 広田
Hiroaki Maruoka
宏彰 丸岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shinto Paint Co Ltd
Toyota Motor Corp
Original Assignee
Shinto Paint Co Ltd
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shinto Paint Co Ltd, Toyota Motor Corp filed Critical Shinto Paint Co Ltd
Priority to JP12712595A priority Critical patent/JPH08294672A/en
Publication of JPH08294672A publication Critical patent/JPH08294672A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain a steel product requiring especially high corrosionproof power. CONSTITUTION: A highly corrosionproof steel product is constituted by successively providing a zinc plating layer (1), a chromate treatment layer (2) and a coating film (3) composed of a compsn. prepared by adding 3-40 pts.wt. of barium metaphosphate to 100 pts.wt. of a water dispersible epoxy ester resin and adjusted to 50-70wt. in the concn. of pigment and produced by successively applying zinc plating and clromate treatment to a steel product and coating the treated product with paint composed of a compsn. prepared by adding 3-40 pts.wt. of barium metaphosphate to 100 pts.wt. of a water dispersible epoxy ester resin and adjusted to 50-70wt. in the concn. of pigment and drying the coated product at 80-100 deg.C for 10min or more.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、高度な防蝕力を要求さ
れる鋼製製品、特に自動車部品における燃料系や潤滑系
などの重要保安鋼製製品に対して、腐食や穴あきなどの
重大な欠陥を長期にわたって防止することを目的に適応
される高防蝕鋼製製品及びその製造方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to steel products requiring a high degree of corrosion resistance, particularly important safety steel products such as fuel systems and lubrication systems for automobile parts, which are subject to serious problems such as corrosion and perforation. The present invention relates to a highly corrosion-resistant steel product adapted for the purpose of preventing various defects over a long period of time, and a manufacturing method thereof.

【0002】[0002]

【従来の技術】従来から鋼製製品の腐食防止を目的に亜
鉛めっき、その他の金属めっき処理やポリエステル樹脂
系塗料、エポキシ樹脂系塗料、メラミンアルキッド樹脂
系塗料などの塗装が行われている。特に高度な防蝕力を
必要とする場合は、亜鉛めっきやその他の金属めっき処
理の後に、めっきの保護を目的にポリエステル樹脂系塗
料、エポキシ樹脂系塗料、メラミンアルキッド樹脂系塗
料などの塗装が行われている。
2. Description of the Related Art Conventionally, for the purpose of preventing corrosion of steel products, zinc plating, other metal plating treatments, polyester resin coatings, epoxy resin coatings, melamine alkyd resin coatings, etc. have been applied. If a particularly high level of corrosion resistance is required, coating such as polyester resin-based paint, epoxy resin-based paint, melamine alkyd resin-based paint, etc. is performed after zinc plating or other metal plating to protect the plating. ing.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、特に高
度な防蝕力を必要とする場合に、亜鉛めっきやその他の
金属めっき処理の後に塗装されるポリエステル樹脂系塗
料、エポキシ樹脂系塗料、メラミンアルキッド樹脂系塗
料などの塗膜では、ワレ、剥離、フクレ、縮みなどを発
生し、十分な高度防蝕力を得ることができないのが現状
である。本発明者らは、高防蝕塗膜の形成方法として、
すでに特開平4−90874を提案しているが、かかる
方法は亜鉛めっきとクロメート処理を施さない鋼製製品
では高度な防蝕力を得ることは不可能であった。
However, particularly when a high degree of anticorrosiveness is required, polyester resin coatings, epoxy resin coatings and melamine alkyd resin coatings applied after zinc plating or other metal plating treatments. The current situation is that a coating film such as a paint causes cracks, peeling, blistering, shrinkage, and the like, and it is not possible to obtain a sufficient high degree of corrosion resistance. The present inventors, as a method of forming a highly anticorrosion coating film,
Although Japanese Patent Application Laid-Open No. 4-90874 has already been proposed, such a method could not obtain a high degree of anticorrosion power in a steel product which was not galvanized and chromated.

【0004】[0004]

【課題を解決するための手段】本発明者らは、前記の課
題を解決すべく、高防蝕鋼製製品及びその製造方法の研
究を鋭意行った結果、鋼製製品に特定の金属亜鉛めっき
処理した後に、水分散型エポキシエステル樹脂に、特定
量のメタほう酸バリウムを含有し、且つ特定のPWCに
調整した塗料を塗装し、特定条件で乾燥することによっ
て、防蝕力が従来になく特に優れた鋼製製品を生産でき
ることを見いだした。これは、特定PWC中にメタほう
酸バリウムを配合した塗膜が、亜鉛めっきが持つ犠牲防
蝕効果の持続性を高めたと推定できる。また、特定PW
Cに調整した塗料を特定条件で乾燥することによって、
形成される塗膜の内部応力が緩和され、付着性の低下を
防いでいると考えられる。これらの知見に基づいて、高
防蝕鋼製製品及びその製造方法を見いだし、本発明を完
成した。
In order to solve the above-mentioned problems, the present inventors have earnestly studied high corrosion resistant steel products and a method for producing the same, and as a result, the steel products were subjected to a specific metal zinc plating treatment. After that, by coating the water-dispersed epoxy ester resin with a paint containing a specific amount of barium metaborate and adjusted to a specific PWC, and drying it under specific conditions, the corrosion resistance was particularly excellent as compared with the conventional one. We have found that we can produce steel products. It can be inferred from this that the coating film in which barium metaborate was blended in the specific PWC enhanced the durability of the sacrificial corrosion prevention effect of zinc plating. In addition, the specific PW
By drying the paint adjusted to C under specific conditions,
It is considered that the internal stress of the formed coating film is relieved and the decrease in adhesion is prevented. Based on these findings, a highly corrosion-resistant steel product and a manufacturing method thereof were found, and the present invention was completed.

【0005】即ち、本発明は鋼製製品に亜鉛めっき
層、クロメート処理層、水分散型エポキシエステル
樹脂100重量部(固形分)に対してメタほう酸バリウ
ム3〜40重量部含有し、且つPWCを50〜70に調
整した塗膜を順次設けた高防蝕鋼製製品である。また、
本発明は、鋼製製品に亜鉛めっきを施し、クロメート処
理した後に、水分散型エポキシエステル樹脂100重量
部(固形分)に対してメタほう酸バリウム3〜40重量
部含有し、且つPWCを50〜70に調整した塗料を塗
装し、80〜100℃で10分以上乾燥することを特徴
とする高防蝕鋼製製品の製造方法である。
That is, according to the present invention, a steel product contains a zinc plating layer, a chromate treatment layer, 3 to 40 parts by weight of barium metaborate per 100 parts by weight (solid content) of a water-dispersible epoxy ester resin, and contains PWC. It is a highly corrosion-resistant steel product in which coating films adjusted to 50 to 70 are sequentially provided. Also,
The present invention, after galvanizing a steel product and subjecting it to chromate treatment, contains 3 to 40 parts by weight of barium metaborate with respect to 100 parts by weight (solid content) of a water-dispersed epoxy ester resin, and has a PWC of 50 to 50 parts by weight. It is a method for producing a highly corrosion-resistant steel product, which comprises applying a paint adjusted to 70 and drying at 80 to 100 ° C. for 10 minutes or more.

【0006】本発明の鋼製製品としては、鉄、鋼、鋳
鉄、鋳鋼、ステンレス鋼などの鉄、およびそれらの合金
素材金属を使用することができる。
As the steel product of the present invention, iron, steel, cast iron, cast steel, iron such as stainless steel, and alloy material metals thereof can be used.

【0007】本発明で鋼製製品に施す亜鉛めっきは、銅
と亜鉛、ニッケルと亜鉛、および銅とニッケルと亜鉛の
複層めっきを溶融亜鉛めっきや電気亜鉛めっきとして使
用することができる。めっき層の厚さは、好ましくは5
μ以上、さらに好ましくは10μ以上を施す。
The zinc plating applied to the steel product according to the present invention may be a double layer plating of copper and zinc, nickel and zinc, or copper and nickel and zinc as hot dip galvanizing or electrogalvanizing. The thickness of the plating layer is preferably 5
μ or more, more preferably 10 μ or more.

【0008】次に本発明では亜鉛めっきを施した鋼製製
品をクロメート処理する。クロメート処理の後、特定の
塗料の塗装を行うが、表面に付着した油分やグリースな
どの除去を目的に溶剤拭きや溶剤蒸気などの脱脂処理を
行うことができる。
Next, in the present invention, the galvanized steel product is chromated. After the chromate treatment, a specific paint is applied, but solvent wiping or solvent vapor degreasing treatment can be performed for the purpose of removing oil and grease adhering to the surface.

【0009】本発明で使用する塗料に含まれる水分散型
エポキシエステル樹脂としては、ビニル化エポキシエス
テルにカルボン酸基を導入し、アミンにより部分中和し
たものを使用することができる。
The water-dispersible epoxy ester resin contained in the coating material used in the present invention may be a vinylated epoxy ester having a carboxylic acid group introduced and partially neutralized with an amine.

【0010】本発明で使用する塗料は、前記の水分散型
エポキシエステル樹脂100重量部(固形分)に対して
メタほう酸バリウム3〜40重量部含有する必要があ
る。メタほう酸バリウム含有量が3重量部未満の場合
は、高い防蝕性能を得ることができないので好ましくな
い。またメタほう酸バリウムの含有量が40重量部を越
える場合は、塗料の経時による粘度変化が著しく、好ま
しくない。
The coating used in the present invention must contain 3 to 40 parts by weight of barium metaborate with respect to 100 parts by weight (solid content) of the water-dispersible epoxy ester resin. When the barium metaborate content is less than 3 parts by weight, high corrosion resistance cannot be obtained, which is not preferable. Further, when the content of barium metaborate exceeds 40 parts by weight, the viscosity of the paint changes remarkably with time, which is not preferable.

【0011】本発明で使用する塗料は、PWCを50〜
70に調整する必要がある。PWCの調整には、カーボ
ンや酸化チタンなどの着色顔料や、タルク、シリカ、カ
オリン、クレー、バライトなどの体質顔料を使用するこ
とができる。また、必要によりクロム化合物、リン酸化
合物、モリブデン酸化合物などの防蝕顔料を使用するこ
とができる。PWCが上記範囲を逸脱する場合は、高い
防蝕性能を得ることができないので好ましくない。
The paint used in the present invention has a PWC of 50 to 50.
It is necessary to adjust to 70. For the adjustment of PWC, a color pigment such as carbon or titanium oxide, or an extender pigment such as talc, silica, kaolin, clay or barite can be used. Further, if necessary, anticorrosion pigments such as chromium compounds, phosphoric acid compounds and molybdic acid compounds can be used. If the PWC deviates from the above range, high corrosion resistance cannot be obtained, which is not preferable.

【0012】本発明で使用する塗料には、前記各成分の
他に必要により通常の塗料に使用されるトリエチルアミ
ンやジメチルエタノールアミンなどのアミン類、エチレ
ングリコールモノブチルエーテルやイソプロピルアルコ
ールなどの有機溶剤類、ナフテン酸亜鉛やナフテン酸コ
バルトなどの反応促進剤などが使用できる。
The paint used in the present invention includes, in addition to the above-mentioned components, amines such as triethylamine and dimethylethanolamine which are used in ordinary paints as required, organic solvents such as ethylene glycol monobutyl ether and isopropyl alcohol, A reaction accelerator such as zinc naphthenate or cobalt naphthenate can be used.

【0013】本発明で使用する塗料は、必要に応じて水
を用いて塗料を希釈することができる。希釈時の粘度
は、例えば20〜50秒(フォードカップNo4)に調
整する。
The paint used in the present invention can be diluted with water as needed. The viscosity at the time of dilution is adjusted to, for example, 20 to 50 seconds (Ford cup No. 4).

【0014】本発明で使用する塗料の塗装は、刷毛塗
り、浸せき塗装、シャワー塗装、エアスプレー塗装、エ
アレススプレー塗装、静電塗装などの一般塗料の塗装に
使用される塗装方法で行うことができる。
The coating of the paint used in the present invention can be carried out by a coating method used for general coating such as brush coating, dip coating, shower coating, air spray coating, airless spray coating and electrostatic coating. .

【0015】本発明で使用する塗料の乾燥は、80〜1
00℃で10分以上乾燥する必要がある。乾燥温度が8
0℃未満又は乾燥時間が10分未満の場合は、耐薬品性
能が悪く、結果として高い防蝕性能を得ることができな
いので好ましくない。乾燥温度が100℃を上回る場合
は、塗料中の水が沸騰することによって塗膜にフクレを
生じ、結果として高い防蝕性を得ることができないので
好ましくない。
The coating used in the present invention may be dried at 80 to 1
It is necessary to dry at 00 ° C for 10 minutes or more. Drying temperature is 8
If the temperature is lower than 0 ° C. or the drying time is shorter than 10 minutes, the chemical resistance is poor and, as a result, high corrosion resistance cannot be obtained, which is not preferable. When the drying temperature is higher than 100 ° C., the water in the coating material is boiled to cause blistering in the coating film, and as a result, high corrosion resistance cannot be obtained, which is not preferable.

【0016】[0016]

【実施例】次に、本発明を下記実施例によって説明す
る。文中の部および%はいずれも重量による。 実施例 1〜6および比較例 1〜7 クロメート処理した亜鉛めっき鋼製パイプに、下記の表
1,2に示す各成分からなる塗料をエアスプレー塗装し
て、下記の表1,2に示す各乾燥温度で10分間乾燥し
て、各鋼製製品を得た。
EXAMPLES Next, the present invention will be explained by the following examples. All parts and% in the text are by weight. Examples 1 to 6 and Comparative Examples 1 to 7 Chromate-treated galvanized steel pipes were air-spray coated with paints containing the components shown in Tables 1 and 2 below, and Each steel product was obtained by drying for 10 minutes at the drying temperature.

【0017】[0017]

【表1】 [Table 1]

【0018】[0018]

【表2】 [Table 2]

【0019】比較例 8 クロメート処理と亜鉛めっきを施さない鋼製パイプを使
用する以外は実施例2と同様の塗装と乾燥をして、鋼製
製品を得た。
Comparative Example 8 A steel product was obtained by applying the same coating and drying as in Example 2 except that a steel pipe not subjected to chromate treatment and galvanizing was used.

【0020】試験例 1 前記のようにして得た鋼製製品の防蝕性能を確認するた
めに塩水噴霧試験を実施した。塩水噴霧試験が1000
時間、3000時間、5000時間経過した時点での鋼
製製品外観を観察した。評価は、外観の錆状況について
異常なしを◎、錆面積5%未満を○、錆面積5%以上2
0%未満を△、錆面積20%以上を×とした。さらに、
外観のフクレ状況について異常なしを◎、錆面積5%未
満を○、錆面積5%以上20%未満を△、錆面積20%
以上を×とした。それらの試験結果を表3,4に示す。
Test Example 1 A salt spray test was conducted to confirm the corrosion resistance of the steel product obtained as described above. 1000 salt spray test
The appearance of the steel product after 3,000 hours and 5,000 hours was observed. As for the evaluation, the appearance of rust was ⊙ when there was no abnormality, ◯ when the rust area was less than 5%, and rust area of 5% or more 2
Less than 0% was evaluated as Δ and rust area of 20% or more was evaluated as x. further,
Regarding the appearance of blistering, there is no abnormality ◎, rust area less than 5% ○, rust area 5% or more and less than 20% △, rust area 20%
The above is marked with x. The test results are shown in Tables 3 and 4.

【0021】[0021]

【表3】 [Table 3]

【0022】[0022]

【表4】 [Table 4]

【0023】表3,4の結果から、本発明の製造方法に
よって製造された鋼製製品は、比較の鋼製製品に比べて
塩水噴霧試験後の外観状況から観て、高防蝕鋼製製品及
びその製造方法として優れていることは明らかである。
From the results shown in Tables 3 and 4, the steel products manufactured by the manufacturing method of the present invention are more highly corrosion-resistant than the comparative steel products in terms of appearance after the salt spray test. It is clear that it is an excellent manufacturing method.

【0024】[0024]

【発明の効果】本発明によれば、特に高度な防蝕力を必
要とする鋼製製品に対して、ワレ、剥離、フクレ、縮み
などによる防蝕力低下を起こすことなく、優れた防蝕力
を得ることができるので、高防蝕鋼製製品及びその製造
方法として好適である。
EFFECTS OF THE INVENTION According to the present invention, excellent corrosion resistance can be obtained for steel products which require particularly high corrosion resistance without causing deterioration in corrosion resistance due to cracking, peeling, blistering, shrinkage and the like. Therefore, it is suitable as a highly corrosion-resistant steel product and a manufacturing method thereof.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 丸岡 宏彰 兵庫県尼崎市南塚口町6丁目10番73号 神 東塗料株式会社内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hiroaki Maruoka 6-1073 Minamitsukaguchi-cho, Amagasaki City, Hyogo Prefecture Shinto Paint Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 鋼製製品に亜鉛めっき層、クロメー
ト処理層、水分散型エポキシエステル樹脂100重量
部(固形分)に対してメタほう酸バリウム3〜40重量
部含有し、且つ顔料重量%濃度(以下PWCと略す)を
50〜70に調整した塗膜を順次設けた高防蝕鋼製製
品。
1. A steel product containing 3 to 40 parts by weight of barium metaborate per 100 parts by weight (solid content) of a zinc plating layer, a chromate treatment layer, and a water-dispersed epoxy ester resin, and a pigment weight% concentration ( (Hereinafter abbreviated as PWC) A product made of highly corrosion-resistant steel, which is sequentially provided with a coating film adjusted to 50 to 70.
【請求項2】 鋼製製品に亜鉛めっきを施し、クロメー
ト処理した後に、水分散型エポキシエステル樹脂100
重量部(固形分)に対してメタほう酸バリウム3〜40
重量部含有し、且つPWCを50〜70に調整した塗料
を塗装し、80〜100℃で10分以上乾燥することを
特徴とする高防蝕鋼製製品の製造方法。
2. A water-dispersed epoxy ester resin 100 after galvanizing a steel product and chromating the steel product.
Barium metaborate 3 to 40 parts by weight (solid content)
A method for producing a highly corrosion-resistant steel product, which comprises coating a coating material which contains PbC in an amount of 50 parts by weight and which is dried at 80 to 100 ° C. for 10 minutes or more.
JP12712595A 1995-04-26 1995-04-26 Highly corrosionproof steel product and production thereof Pending JPH08294672A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12712595A JPH08294672A (en) 1995-04-26 1995-04-26 Highly corrosionproof steel product and production thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12712595A JPH08294672A (en) 1995-04-26 1995-04-26 Highly corrosionproof steel product and production thereof

Publications (1)

Publication Number Publication Date
JPH08294672A true JPH08294672A (en) 1996-11-12

Family

ID=14952235

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12712595A Pending JPH08294672A (en) 1995-04-26 1995-04-26 Highly corrosionproof steel product and production thereof

Country Status (1)

Country Link
JP (1) JPH08294672A (en)

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