Method for painting article to be treated
A coating method and a technology for articles, which are applied in the direction of surface coating liquid devices, coatings, electrolytic coatings, etc., can solve the problems of rapid deterioration of the degreasing bath, residual sealing bath, entering the degreasing bath, etc., to reduce the number of steps , improve quality and save energy
Inactive Publication Date: 2012-08-29
SUZUKI MOTOR CORP
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Problems solved by technology
For this reason, it is desirable to omit the drying step, but when the drying step is omitted, problems such as dripping of water droplets and carry-over of the sealing bath into the degreasing bath, etc. are caused
[0025] In addition, sealing baths are generally acidic, so even if the item is sufficiently washed with water, there is a possibility that the acidic sealing bath is carried into the alkaline degreasing bath and the degreasing bath is rapidly deteriorated because when the shape of the item is complicated The sealing bath remains in the treated item and also remains in the pores of the anodized film
Method used
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Embodiment
[0085] In this example, the test pieces treated with the method according to the invention were subjected to the adhesion test of the coating film in a checkerboard test.
[0086] Aluminum alloy ADC 12 was used for the test piece. Immerse the test piece as an anode in a 200g / L sulfate bath, and pass an anodized film 3 with a film thickness of 10 μm at 2A / dm 2 Under the condition of the current density, the current was passed through the test piece for 20 minutes to form on the test piece. Next, in order to evaluate the degreasing effect of the strongly alkaline sealing bath 5 used for the anodized film 3, assuming that after the anodizing process, due to the dirt deposition caused after the jig was replaced, the machine oil was applied to the surface to be evaluated (anodized of the test piece membrane surface).
[0087] Thereafter, the sealing treatment and the degreasing treatment were simultaneously performed by immersing the oil-applied test piece in a strongly alkaline ...
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Abstract
An object of the present invention is to unify sealing treatment and degreasing treatment by treating an anodic oxide film of an article to be treated made from aluminum or an aluminum alloy with a strongly basic treatment liquid containing a lithium ion, and simplify a pretreatment step for painting. A method for painting the article to be treated, by forming the anodic oxide film on the article to be treated made from aluminum or the aluminum alloy, and painting the article to be treated by using the anodic oxide film as a substrate, includes a first step including anodic treatment S1 and a second step including painting treatment S3, wherein sealing treatment and degreasing treatment are conducted in a unified way with the use of a strongly basic bath containing the lithium ion.
Description
technical field [0001] The present invention relates to a coating technique for articles to be treated made of aluminum or an aluminum alloy, and in particular to a coating of articles to be treated that simplifies pretreatment for coating of articles to be treated as parts made of aluminum or an aluminum alloy method. Background technique [0002] Conventionally, exterior parts made of aluminum or aluminum alloys such as outboard motors and the like are anodized to provide a coating film formed thereon serving as a substrate (surface) for coating, thereby improving the rust resistance of the outer surfaces of the parts ability. [0003] Anodizing treatment is a treatment in which an article to be treated is dipped in a treatment liquid as an anode, and an electric current is passed through the article to oxidize the surface of the article to be treated, thereby forming a film on the surface of the article (anodizing coating treatment). The surface of the anodized film is ...
Claims
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IPC IPC(8): C25D11/18
CPCB05D7/16B05D2202/25B05D2350/60C25D11/06C25D11/24
Inventor 田中洋臣藤田昌弘村松仁
Owner SUZUKI MOTOR CORP