JPH01230796A - Coating method by electrodeposition - Google Patents
Coating method by electrodepositionInfo
- Publication number
- JPH01230796A JPH01230796A JP5559988A JP5559988A JPH01230796A JP H01230796 A JPH01230796 A JP H01230796A JP 5559988 A JP5559988 A JP 5559988A JP 5559988 A JP5559988 A JP 5559988A JP H01230796 A JPH01230796 A JP H01230796A
- Authority
- JP
- Japan
- Prior art keywords
- paint
- electrodeposition
- bag structure
- bath
- bag
- 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
Links
- 238000004070 electrodeposition Methods 0.000 title claims abstract description 26
- 238000000576 coating method Methods 0.000 title claims description 23
- 239000003973 paint Substances 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000010422 painting Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 6
- 230000002265 prevention Effects 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 2
- 229910000165 zinc phosphate Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910000398 iron phosphate Inorganic materials 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は袋構造部の内部に防錆性に必要な膜厚を形成す
る電着塗装方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electrodeposition coating method for forming a film thickness necessary for rust prevention inside a bag structure.
従来の技術
従来、電着塗装方法は、塗着効率に優れ、又膜厚も均一
に塗装でき、しかも防錆性に優れた被膜が形成できるこ
とから自動車工業を中止として広く普及している。BACKGROUND OF THE INVENTION Conventionally, electrodeposition coating methods have been widely used in the automobile industry because they have excellent coating efficiency, can be coated with a uniform thickness, and can form coatings with excellent rust prevention properties.
一般に、電着塗装方法は被塗物を電着浴液中に浸漬し、
被塗物と対極板との電極間に直流電圧な印加改ニて、被
塗物上に塗料が析出し被膜を形成させる方法であり、又
被塗物上に析出した被膜は、一般に電着浴の固有電気抵
抗に対して大きくなるため、該被膜上への電着浴の析出
が抑制され均一な被膜が得られるとともに被塗物のすべ
ての部位にも被膜が析出するというつきまわり性に優れ
た方法である。Generally, in the electrodeposition coating method, the object to be coated is immersed in an electrodeposition bath liquid,
In this method, a DC voltage is applied between the electrodes of the object to be coated and a return electrode, and the paint is deposited on the object to form a film.The film deposited on the object is generally formed by electrodeposition. Because it is larger than the specific electrical resistance of the bath, the deposition of the electrodeposition bath on the coating is suppressed and a uniform coating is obtained, as well as the coating is deposited on all parts of the object. This is an excellent method.
しかしながら、袋構造部を有する被塗物を電着塗装する
と、袋構造部の内部に電流が分配され難いので内部の被
塗物への析出が行なわれないか又は行なわれたとしても
わずかな量しか析出せず、防錆性に優れた被膜が形成さ
れないという欠点がある。However, when an object having a bag structure is electrodeposited, it is difficult for the current to be distributed inside the bag structure, so deposition on the object inside does not take place, or even if it does, the amount is small. However, there is a drawback that a film with excellent rust prevention properties is not formed.
もっともこのような欠点を改良する方法として、被塗物
と極板との電極間の印加電圧を高くしたり、又印加電圧
の通電時間を長くしたりすることが行なわれるが、これ
らの方法では袋構造を有する外部の被塗物上に必要以上
に厚く塗装されるため経済的に不利である。又該塗装方
法以外にも高分子の樹脂及び高願料濃度の塗料を使用し
て被塗物に析出した被膜の固有抵抗をさらに大きくする
ことにより袋構造部の被塗物に析出されるのに必要なイ
オン（電流）を多く分配させる塗料組成面からの改良が
行なわれているが、この方法では析出被膜の熱流動性が
低下するので、平滑性及び防錆性に優れた硬化被膜が得
られないという欠点がある。However, methods to improve these drawbacks include increasing the voltage applied between the electrodes of the object to be coated and the electrode plate, or increasing the duration of the applied voltage, but these methods do not This method is economically disadvantageous because it coats an external object having a bag structure more thickly than necessary. In addition to the above coating method, by using a polymeric resin and a paint with a high concentration of coating material to further increase the resistivity of the film deposited on the object to be coated, it is possible to prevent the deposits from being deposited on the object to be coated in the bag structure. Improvements have been made in terms of paint composition to distribute more ions (current) necessary for The disadvantage is that it cannot be obtained.
発明が解決しようとする課題
本発明は、被塗物の外部の平滑性及び防錆性の低下を伴
わず袋構造部の内部に防錆性に優れた被膜を形成させる
塗装方法を提供することを目的としてなされたものであ
る。Problems to be Solved by the Invention An object of the present invention is to provide a coating method that forms a film with excellent rust prevention properties inside a bag structure without reducing the external smoothness and rust prevention properties of the object to be coated. It was made for the purpose of
課題を解決するための手段
本発明者等は、このような欠点を克服する方法について
種々検討した結果、袋構造部の内部の電着塗料温度を袋
構造部の外部の電着塗料浴温よりも、島くすると、内部
の浴塗料の比電導度が上昇するため電着塗料が電析され
易くなり、又析出塗膜の電気抵抗も低下するので塗膜が
上昇できることを見い出し本発明を完成するに至った。Means for Solving the Problems As a result of various studies on methods to overcome these drawbacks, the inventors of the present invention have determined that the temperature of the electrocoating paint inside the bag structure is lower than the bath temperature of the electrocoating paint outside the bag structure. However, when the bath paint is formed into islands, the specific conductivity of the internal bath paint increases, making it easier for the electrodeposition paint to be deposited, and the electric resistance of the deposited paint film also decreases, allowing the paint film to rise.This discovery led to the completion of the present invention. I ended up doing it.
即ち、本発明は袋構造部を有する導電性被塗物を電着塗
料浴に浸漬し、電着塗装するに当って、袋構造部を加温
した後、電着塗料浴に浸漬することを特徴とする電着塗
装方法に関する６本発明塗装方法で使用する袋構造部を
有する導電性被塗物としては、例えば自動車用、工業用
、家電用等で塗装される物品又はそれらの部品等である
。該導電性被塗物としてはアルミニウム、鉄鋼及び該鉄
鋼の表面に亜鉛、クロム、スズ、アルミニウム等をメツ
キしたメツキ鋼板、或いは鉄鋼の表面をクロム酸、リン
酸鉄、リン酸亜鉛で化成処理した処理鋼板等が使用でき
る。That is, in the present invention, when a conductive object to be coated having a bag structure is immersed in an electrodeposition paint bath and then subjected to electrodeposition coating, the bag structure is heated and then immersed in the electrodeposition paint bath. 6.Characteristics of the Electrodeposition Coating Method 6. The conductive objects having a bag structure used in the coating method of the present invention include, for example, articles to be coated for automobiles, industrial uses, home appliances, etc., or their parts. be. The conductive coating material is aluminum, steel, a plated steel plate in which the surface of the steel is plated with zinc, chromium, tin, aluminum, etc., or the surface of the steel is chemically treated with chromic acid, iron phosphate, or zinc phosphate. Treated steel plates etc. can be used.
また袋構造部を加温する方法としては、該袋構造部を加
温することができる方法であれば特に制限なしに採用す
ることができるが、例えば袋構造部の内部にホットエア
ーを吹き付ける方法が容易に実施できることから好適で
ある。また、加温は電着塗装する以前に袋構造部の内部
の電着塗料温度゛が該外部よりも高くなる様に行なわれ
る。In addition, as a method of heating the bag structure, any method that can heat the bag structure can be adopted without particular restriction, but for example, a method of blowing hot air into the inside of the bag structure This method is suitable because it can be easily implemented. Further, heating is performed before electrocoating so that the temperature of the electrocoat inside the bag structure is higher than that outside the bag structure.
本発明塗装方法によると、袋構造部の内部の浴塗料の比
電導度が上昇するため電析され易くなり、又析出塗膜の
電気抵抗も低下するので、従来の方法よりも袋構造部の
内部表面に塗膜を厚く形成することができ、防錆性に優
れた効果を発揮できる。According to the coating method of the present invention, the specific conductivity of the bath paint inside the bag structure increases, making it easier to be electrodeposited, and the electrical resistance of the deposited coating film also decreases, so that the paint inside the bag structure increases. A thick coating can be formed on the internal surface, providing excellent rust prevention.
実施例
ニレクロン９４００ （関西ペイント四社製、商品名、
カチオン型電着塗料）の浴塗料を用い、袋構造部を熱風
を用いて加温した導電性被塗物（リン酸亜鉛処理鉄鋼部
品）を陰極とし、陽極との間に２５０■電圧を印加し、
３分間電着塗装を行なった。Example Nirekron 9400 (manufactured by Kansai Paint Shisha, trade name,
Using a bath paint of cationic electrodeposition paint, the bag structure is heated with hot air and a conductive object (zinc phosphate treated steel parts) is used as a cathode, and a voltage of 250μ is applied between it and the anode. death,
Electrodeposition coating was performed for 3 minutes.
袋構造部内の浴塗料の温度を、従来塗装される浴塗料の
温度（２８°Ｃ）よりもそれぞれ１．２゜３．４及び５
°Ｃ高くして（尚し、０℃は従来の塗装方法に相当）、
電着塗装を行なった。該袋構造部の内部表面に形成した
電着析出塗膜の増加したＩＩｑ厚を測定し、該膜厚の増
加分と袋構造部内の浴温度との関係を図に示した。The temperature of the bath paint inside the bag structure is 1.2°, 3.4° and 5°, respectively, lower than the temperature of conventionally applied bath paint (28°C).
By increasing the temperature by °C (0 °C corresponds to the conventional painting method),
Electrodeposition painting was performed. The increased IIq thickness of the electrodeposited coating film formed on the inner surface of the bag structure was measured, and the relationship between the increase in film thickness and the bath temperature inside the bag structure is shown in the figure.
添付図面は本発明塗装方法による増膜特性な示すグラフ
である。The attached drawing is a graph showing the film increasing characteristics according to the coating method of the present invention.
Claims (1)
し、電着塗装するに当って、袋構造部を加温した後、電
着塗料浴に浸漬することを特徴とする電着塗装方法。1. A conductive object to be coated having a bag structure is immersed in an electrodeposition paint bath, and when performing electrodeposition coating, the bag structure is heated and then immersed in the electrodeposition paint bath. Electrodeposition painting method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5559988A JPH01230796A (en) | 1988-03-09 | 1988-03-09 | Coating method by electrodeposition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5559988A JPH01230796A (en) | 1988-03-09 | 1988-03-09 | Coating method by electrodeposition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01230796A true JPH01230796A (en) | 1989-09-14 |
Family
ID=13003238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5559988A Pending JPH01230796A (en) | 1988-03-09 | 1988-03-09 | Coating method by electrodeposition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01230796A (en) |
-
1988
- 1988-03-09 JP JP5559988A patent/JPH01230796A/en active Pending
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