JPS6324070B2 - - Google Patents
Info
- Publication number
- JPS6324070B2 JPS6324070B2 JP59150825A JP15082584A JPS6324070B2 JP S6324070 B2 JPS6324070 B2 JP S6324070B2 JP 59150825 A JP59150825 A JP 59150825A JP 15082584 A JP15082584 A JP 15082584A JP S6324070 B2 JPS6324070 B2 JP S6324070B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- chromate
- heat
- silicone resin
- galvanized
- 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.)
- Expired
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 229920002050 silicone resin Polymers 0.000 claims description 11
- 239000003973 paint Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000004381 surface treatment Methods 0.000 claims description 5
- 238000010422 painting Methods 0.000 claims description 2
- 238000005246 galvanizing Methods 0.000 claims 1
- 239000002585 base Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229920000180 alkyd Polymers 0.000 description 2
- 239000003849 aromatic solvent Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010405 reoxidation reaction Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
Description
【発明の詳細な説明】
技術分野
本発明は、ボルト、ナツト、座金、ドリルね
じ、タツピンねじなどの締結部品の防蝕を目的と
した表面処理方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a surface treatment method for the purpose of corrosion-proofing fastening parts such as bolts, nuts, washers, drill screws, and tuft pin screws.
従来の技術
締結部品の防蝕処理としては、防錆効果が大き
く、かつ安価である亜鉛めつきが最も一般的であ
るが、今日では、亜鉛めつきの白色腐食（塩基性
炭酸亜鉛）の発生を防いで耐蝕性を向上させると
共に、亜鉛めつきの外観を美しくし、更には塗装
下地として密着性を良くするために、ほとんどの
亜鉛めつきにクロメート処理が施されるようにな
つている。Conventional technology The most common corrosion-proofing treatment for fasteners is zinc plating, which has a large rust-preventing effect and is inexpensive. Chromate treatment is now being applied to most zinc plating to improve its corrosion resistance, make the appearance of the galvanize beautiful, and improve its adhesion as a paint base.
クロメート処理は、亜鉛めつき皮膜の上に化学
的に亜鉛クロム酸の皮膜を生成沈着させる方法
で、その皮膜はゲル状の水和物であり、金属より
軟らかくて、傷がつき易い難点がある。もつと
も、傷が浅い場合は、クロメート皮膜の再酸化力
によつて亜鉛めつき皮膜を保護する特性をもつて
いるが、それにも限度があり、クロメート処理を
施した締結部品に使用上その他の外力が加わつた
とき、表面のクロメート皮膜が破壊され、十分な
防錆効果を期待できないことが多い。 Chromate treatment is a method of chemically depositing a film of zinc chromate on top of the galvanized film.The film is a gel-like hydrate and has the disadvantage that it is softer than metal and easily scratches. . However, if the scratches are shallow, the reoxidation power of the chromate film has the ability to protect the galvanized film, but there are limits to this, and chromate-treated fasteners cannot be exposed to other external forces during use. When this happens, the chromate film on the surface is destroyed and a sufficient rust prevention effect cannot often be expected.
また、クロメート皮膜は耐熱性及び耐水性の点
でも問題がある。例えば、350℃以上の温度にな
ると、粉化して脱落し易くなり、連続して130℃
以上の温度にさらされる場合には、亜鉛めつき皮
膜に対する防蝕力が消失する。また、熱湯に浸し
たり、長時間水に浸漬させると、クロメート皮膜
が膨潤して崩壊され、耐蝕性が失なわれる欠点が
ある。 Furthermore, chromate films also have problems in terms of heat resistance and water resistance. For example, if the temperature exceeds 350℃, it will turn into powder and easily fall off, and if the temperature exceeds 350℃,
When exposed to temperatures above this level, the corrosion protection for galvanized coatings is lost. Furthermore, when immersed in boiling water or immersed in water for a long time, the chromate film swells and collapses, resulting in a loss of corrosion resistance.
発明が解決しようとする問題点
上述したクロメート皮膜の欠点を解決するた
め、クロメート皮膜を塗膜で被覆して保護する手
段は知られているが、この場合、どのような皮膜
が最も効果的であるかが問題となる。Problems to be Solved by the Invention In order to solve the above-mentioned drawbacks of the chromate film, it is known to protect the chromate film by covering it with a paint film, but in this case, what kind of film is most effective? The question is whether there is.
本発明者は、耐蝕性、耐熱性にすぐれ、かつ外
力に対しても強靭な皮膜を得ることを目的として
鋭意研究し、試験を重ねた結果、亜鉛がそのイオ
ン化傾向によつて鉄素地を保護するのと同様に、
亜鉛及びクロムをイオン化傾向によつて保護する
金属のうち加工性及びコストを考慮してアルミニ
ウムが最も有効であることに着目し、更に耐熱
性、密着性及び耐候性にすぐれたシリコン樹脂を
添加することによつて、本発明を完成するに至つ
た。 The inventor of the present invention conducted extensive research and conducted numerous tests with the aim of obtaining a film that has excellent corrosion resistance, heat resistance, and is strong against external forces.As a result, the inventor discovered that zinc protects the iron substrate through its ionization tendency. Similarly,
Among the metals that protect zinc and chromium by their tendency to ionize, we focused on aluminum as the most effective metal in terms of workability and cost, and added silicone resin that has excellent heat resistance, adhesion, and weather resistance. As a result, we have completed the present invention.
問題点を解決するための手段
すなわち、本発明は、締結部品の鉄素地に亜鉛
めつきを施し、クロメート処理したのち、クロメ
ート皮膜にアルミニウム粉末及びシリコン樹脂を
含む耐熱塗料を焼付け塗装することを特徴とする
締結部品の表面処理方法である。Means for Solving the Problems That is, the present invention is characterized in that the iron base of fastening parts is galvanized and chromate treated, and then a heat-resistant paint containing aluminum powder and silicone resin is baked on the chromate film. This is a surface treatment method for fastening parts.
本発明によれば、上記耐熱塗料は、アルミニウ
ム粉末、シリコン樹脂の他アルキツド樹脂及び芳
香族系溶剤を添加した組成からなる塗料が好適で
あり、アルミニウム粉末は重量比で10〜15％、そ
してシリコン樹脂は重量比で３〜10％の範囲が有
効である。 According to the present invention, the heat-resistant paint is preferably a paint composed of aluminum powder, a silicone resin, an alkyd resin, and an aromatic solvent, the aluminum powder being 10 to 15% by weight, and silicone. It is effective to use resin in a range of 3 to 10% by weight.
実施例
以下、本発明の実施例を図面に基づいて説明す
る。図面は本発明方法により表面処理した締結部
品の拡大断面図を示しており、１は鉄素地、２は
亜鉛めつき膜、３はクロメート皮膜、４はアルミ
ニウム粉末及びシリコン樹脂を含む耐熱塗料を焼
付け塗装して形成した塗膜である。Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. The drawing shows an enlarged sectional view of a fastening part whose surface has been treated by the method of the present invention. 1 is an iron base, 2 is a galvanized film, 3 is a chromate film, and 4 is a heat-resistant paint containing aluminum powder and silicone resin baked on. It is a coating formed by painting.
上記の構成から明らかなように、薄くて、軟ら
かいクロメート皮膜３が強靭で耐熱性を有するア
ルミニウム及びシリコン樹脂を含む塗膜４により
保護されているので、外力及び熱に対して強く、
たとえ外力によつてクロメート皮膜３が破れ亜鉛
めつき膜２に達する傷ができても、塗膜４中のア
ルミニウムのイオン化傾向が亜鉛より大きいの
で、亜鉛めつき膜２及びその下の鉄素地１を確実
に保護し、錆の発生を有効に防止する。 As is clear from the above structure, since the thin, soft chromate film 3 is protected by the coating film 4 containing tough and heat-resistant aluminum and silicone resin, it is resistant to external forces and heat.
Even if the chromate film 3 is torn by an external force and a scratch is created that reaches the galvanized film 2, the ionization tendency of aluminum in the coating film 4 is greater than that of zinc, so the galvanized film 2 and the underlying iron base 1 Reliably protects and effectively prevents rust from occurring.
比較例
試料１；亜鉛めつき（厚さ約10μ）を施し、クロ
メート処理したタツピンねじ
試料２ （本発明方法の実施品）；
亜鉛めつき（厚さ約10μ）を施し、クロメ
ート処理したのち、下記成分の耐熱塗料を
焼付け塗装（200℃／20分）したタツピン
ねじ。塗膜厚 約20μ
成分表
アルミニウム粉末 13％（重量比）
シリコン樹脂 3.5％（重量比）
アルキツド樹脂 13.8％（重量比）
芳香族系溶剤 69.7％（重量比）
上記の試料１と試料２につき行なつた塩水噴霧
試験、耐塩酸試験及び耐アルカリ試験の結果は次
の通りである。Comparative Example Sample 1: Galvanized (approximately 10μ thick) and chromate-treated tuft pin screw Sample 2 (implementation of the method of the present invention): Galvanized (approximately 10μ thick) and chromate-treated, Tatsu pin screws baked and painted (200℃/20 minutes) with heat-resistant paint containing the following ingredients. Coating film thickness: Approximately 20μ Ingredient list Aluminum powder 13% (weight ratio) Silicone resin 3.5% (weight ratio) Alkyd resin 13.8% (weight ratio) Aromatic solvent 69.7% (weight ratio) For sample 1 and sample 2 above The results of the hot salt spray test, hydrochloric acid resistance test, and alkali resistance test are as follows.
(1) 塩水噴霧試験 JISZ2371適用
試験時間432時間後、試料１は鉄素地の腐食が
著しく、全面にわたつて赤錆が発生していたが、
資料２は少し白色腐食の発生がみられる程度で、
赤錆は全く認められなかつた。(1) Salt spray test JISZ2371 applied After 432 hours of testing, the iron base of sample 1 was severely corroded and red rust had formed over the entire surface.
Document 2 shows a slight amount of white corrosion,
No red rust was observed at all.
(2) 耐塩酸試験
５％濃度の塩酸溶液に24時間浸漬した。試料１
は鉄素地の腐食が著しく、全面にわたつて斑点状
の腐食痕が発生していたが、試料２は全く変化が
無かつた。(2) Hydrochloric acid resistance test Immersed in a 5% hydrochloric acid solution for 24 hours. Sample 1
In Sample 2, the iron base was severely corroded, with spotty corrosion marks appearing over the entire surface, but in Sample 2, there was no change at all.
(3) 耐アルカリ試験
３％濃度の水酸化ナトリウム溶液に72時間浸漬
した。試料１は鉄素地の腐食は認められなかつた
が、めつき膜が完全にはげてしまつて鉄素地が露
出していた。一方、試料２はアルカリによつて少
し塗膜がおかされてわずかに変色していたが、下
地のめつき膜は完全に元の状態であつた。(3) Alkali resistance test It was immersed in a 3% sodium hydroxide solution for 72 hours. In sample 1, no corrosion of the iron base was observed, but the plating film had completely peeled off and the iron base was exposed. On the other hand, in Sample 2, the coating film was slightly damaged by the alkali and slightly discolored, but the underlying plating film remained completely in its original state.
発明の効果
上述のように本発明によれば、鉄素地１が亜鉛
めつき膜２、クロメート皮膜３、アルミニウム及
びシリコン樹脂を含む塗膜４からなる３層の皮膜
により保護されているので、すぐれた防錆、防蝕
効果を奏し、かつ上層のアルミニウム及びシリコ
ン樹脂を含む塗膜４が強靭ですぐれた耐熱性、耐
候性を備えているので、外力及び熱に対しても強
い特長がある。したがつて、本発明方法は、ねじ
込み時に大きな摩擦抵抗が働いて発熱を伴い、か
つ使用時において風雨にさらされることの多いタ
ツピングねじやドリルねじの表面処理としてきわ
めて有効である。Effects of the Invention As described above, according to the present invention, the iron substrate 1 is protected by the three-layer film consisting of the galvanized film 2, the chromate film 3, and the coating film 4 containing aluminum and silicone resin. In addition, the coating film 4 containing aluminum and silicone resin in the upper layer is tough and has excellent heat resistance and weather resistance, so it is resistant to external forces and heat. Therefore, the method of the present invention is extremely effective for surface treatment of tapping screws and drill screws, which generate heat due to large frictional resistance when screwed in, and are often exposed to wind and rain during use.
図面は本発明方法により表面処理した締結部品
の要部拡大断面図である。
１……鉄素地、２……亜鉛めつき膜、３……ク
ロメート皮膜、４……アルミニウム及びシリコン
樹脂を含む塗膜。
The drawing is an enlarged sectional view of a main part of a fastening component whose surface has been treated by the method of the present invention. 1... Iron base, 2... Galvanized film, 3... Chromate film, 4... Paint film containing aluminum and silicone resin.
Claims (1)
メート処理したのち、クロメート皮膜にアルミニ
ウム粉末及びシリコン樹脂を含む耐熱塗料を焼付
け塗装することを特徴とする締結部品の表面処理
方法。 ２ 前記耐熱塗料が重量比で10〜15％のアルミニ
ウム粉末及び３〜10％のシリコン樹脂を含んでい
る特許請求の範囲第１項記載の締結部品の表面処
理方法。[Scope of Claims] 1. Surface treatment of fastening parts, characterized by galvanizing the iron base of the fastening parts, subjecting them to chromate treatment, and then baking and painting the chromate film with a heat-resistant paint containing aluminum powder and silicone resin. Method. 2. The method for surface treatment of fastening parts according to claim 1, wherein the heat-resistant paint contains 10 to 15% aluminum powder and 3 to 10% silicone resin by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15082584A JPS6130677A (en) | 1984-07-19 | 1984-07-19 | Surface treatment of metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15082584A JPS6130677A (en) | 1984-07-19 | 1984-07-19 | Surface treatment of metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6130677A JPS6130677A (en) | 1986-02-12 |
| JPS6324070B2 true JPS6324070B2 (en) | 1988-05-19 |
Family
ID=15505223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15082584A Granted JPS6130677A (en) | 1984-07-19 | 1984-07-19 | Surface treatment of metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6130677A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5379785B2 (en) * | 2010-12-27 | 2013-12-25 | 株式会社大商 | Method for forming topcoat film |
| CN103732023A (en) * | 2013-12-04 | 2014-04-16 | 任保林 | Shell of portable electronic device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5919152A (en) * | 1982-07-26 | 1984-01-31 | 川崎製鉄株式会社 | Composite coated steel plate having excellent corrosion protection, spot welding property and moldability |
-
1984
- 1984-07-19 JP JP15082584A patent/JPS6130677A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5919152A (en) * | 1982-07-26 | 1984-01-31 | 川崎製鉄株式会社 | Composite coated steel plate having excellent corrosion protection, spot welding property and moldability |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6130677A (en) | 1986-02-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |