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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I just read what I wrote above and I am not sure why I said what I did. Considerably lower temperatures are required to cure the autodeposited parts.

Express Coat Corporation

We looked at it for autophpretic some heavy zinc plating on couplings and had to dismiss it because the parts are handled very roughly and will chip and rust. This process has been in commercial use since Latex films form by coalescence. These criteria have been established to ensure the maximum performance on each part.

From beautiful Pine Beach New Jersey: Uniformly coats the inside and outside of tubular shapes, complex assemblies, and narrow crevices. 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.

We have two lines running with ACC. The chemical reaction continues in the second layer, which results in film deposition and increased film thickness instead of solids loss to dragout. Withstands nicking and marring for better handling.

The elimination of these stages leads to considerable savings in required floor space, energy, and operating costs, as well as the total elimination of toxic metals from the process.

  DIN 17243 PDF

But in case of electrocoating, the surface atom of the lattice may form bond with foreign atoms. 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. These ions interact with the latex in solution causing coating deposition on the surface of the steel parts.

Free from carbon enbrittlement. Thanks for the help.

Autophoretic® Coating Process

The Autodeposition process can be successfully applied to galvanized substrates. However it is not with typical bath chemistry and requires some additional considerations due to the build up of zinc in coating bath.

If not, I’m not so sure that this work would have legitimate scholarly value: High corrosion resistance Generally hrs. 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.

Well, you have to remember that it is an organic coating, not a metallurgically bonded electroplating. This unusual feature strongly limits carryover of coating chemicals into the rinse tanks and greatly reduces the demand for waste treatment.

This is a proocess way to meet higher performance and corrosion resistance standards at a competitive price. All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer.

Not compatible with aluminum or galvanized material. Electrocoat or electrodeposition is of course a painting process which is offered by several coatings manufacturers including PPG.

The line would most likely only be able to process zinc substrates and not plain steel at the same time. It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages.


A by-product of the heat-treating process No adhesive bonding materials such as tape, epoxy, etc. No autophorwtic markers, die, bluing or coil markings. This forum is for technical discussions, not promotion of one technology over another, so please tell us what are the indications when electrocoating would be a better choice. Depends on solvent, time, and temperature.

This allows the chemical activators to diffuse rapidly in the film and etch the surface of the metal. I have developed, researched, and produced autodeposition coatings, and lead this coatings to be applied in some automobile factories for many years. Typically, film thickness is controlled from 0. 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. Please contact your local PPG office for that paper.

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.


Initially, ahtophoretic deposition process is quite rapid, but slows down as the film increases in thickness. 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. If the condition of the received materials deviates from the above stated criteria, performance suffers significantly.

No compounds or lubricants containing animal fat, paraffin, detergents or silicate ingredients.