AUTOPHORETIC COATING PROCESS PDF
Autophoretic Coating Process is a waterborne process in which organic polymeric emulsion gets chemically deposited on the surface of a clean metal substrate. Basics of Autophoretics: Also known as autodeposition, A-coat or AP. It is a waterborne process which depends on chemical reactions between a ferrous. AUTODEPOSITION is a waterborne process which depends on chemical reactions to achieve 5 — [email protected] Chemical Coating. Stage No. 6 — Plant.
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Autophoretic Coating Plants, Autophoretic Coating Plant, Manufacturer, India
The newly deposited organic film proocess adherent yet quite porous. However it is not with typical bath chemistry and requires some additional considerations due to the build up of zinc in coating bath.
The coating thickness of the autodeposited film is time porcess temperature related. Since its inception, this unique process has been employed to coat billions of square feet of surface.
From beautiful Pine Beach Coatinh Jersey: Of course, that doesn’t mean that ALL parts will prcess and rust! The continuous formation of coating provides a film with a high degree of surface protection and corrosion resistance. On leaving the bath, the coating consists of two layers; one is a very cohesive reacted layer; while the other is composed of undeposited excess polymer and activator from the bath. Thanks for the help. The mildly acid bath liberates a small amount of iron from the steel parts being immersed, causing an immediate surface reaction that releases iron ions.
The chemical reaction continues in the second layer, which results in film deposition and increased film thickness instead of solids loss to dragout. Not compatible with aluminum or galvanized material. This unusual feature strongly limits carryover of coating chemicals into the rinse tanks and greatly reduces the demand for waste treatment. Initially, the deposition process is quite rapid, but slows procsss as the film increases in thickness.
But now we have another process reported to offer percent advantages over competitive coatings and 0 percent disadvantages. High corrosion resistance Generally hrs.
Description of Autophoretic®
Are there procedures in place to preclude hydrogen damage in such parts? If the condition of the received materials deviates from the above stated criteria, performance suffers significantly. The chemical reaction with the metal and the paint flows quickly as the film builds providing a self-limiting feature which results in a uniform thickness for the entire part. Is not UV stable.
I know that these two processes are not the same. Coats evenly on all surfaces; where it flows it coats with no runs or sags. Presently, there are numerous installations in operation, both captive and job-shop, coating a variety of fabricated steel parts for the automotive and general industry markets. This procrss a revolutionary way to meet higher performance and corrosion resistance standards at a competitive price.
Autophoretic® Coating Process
All information presented is for procesz reference and does not represent a professional opinion nor the policy of an author’s employer. This diffusion control leads to a uniform coating thickness on complex shapes and in recessed areas.
I just read what I wrote above and I am not sure why I said what I did. The metal surface of the part requires only cleaning and rinsing to prepare for the chemical reaction to take place; NO electrical charge or pre-coat is required.
Electrocoat or electrodeposition is of course a painting process which is offered by several coatings manufacturers including PPG. If you try our search engine, I’m sure you can find some more. Depends on solvent, time, prlcess temperature. It’s one more tool in the arsenal, and will fill the needs some of the time; but you have to look at the actual parts and the actual service conditions.
In hot dip coating, where Zn getting may be diffused into the lattice structure of the Fe and get attached simple substitution. Pencil hardness of 6H to 7H. Please contact your local PPG office for that paper.
Unlike coating processes that require a charge to deposit the coating i. Well, you have to remember that it is an organic coating, not a metallurgically bonded electroplating.
Metal surface must be low to medium carbon, cold or hot rolled steel. The Autodeposition process can be successfully applied to galvanized substrates. If not, I’m not so sure that this work would have legitimate scholarly value: Since this process involves a mild acid acting on the base part, can it result in delayed cracking under stress from hydrogen damage on a quench and tempered part as with other processes i.