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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In both cases metallic bond is getting formed, but the bonding nature may not be same. We have two lines running with ACC. Has anyone experience with this coating on autophorehic zinc surface? These ions interact with the latex in solution causing coating deposition on the surface of the steel parts. Presently, there are numerous installations in operation, both captive and job-shop, coating a variety of fabricated procrss parts for the automotive and general industry markets.
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 peocess build up of zinc in coating bath. Initially, the deposition process is quite rapid, but slows down as the film increases in thickness.
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.
Description of Autophoretic®
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. Please contact your local PPG office for that paper.
Well, you have to remember that it is an organic coating, not a metallurgically bonded electroplating. This diffusion control leads to a uniform coating thickness on complex shapes and in recessed areas. This is a revolutionary way to meet higher performance and corrosion resistance standards at a procezs price. This unusual feature strongly clating carryover of coating chemicals into the rinse tanks and greatly reduces the demand for waste treatment.
The procesz reaction continues in the second layer, which results in film deposition and increased film thickness instead of solids loss to dragout. It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages. We looked at it for replacing some heavy zinc plating on couplings and had to dismiss it because the parts are handled very roughly and will chip and rust. From beautiful Xutophoretic Beach New Jersey: These criteria have been established to ensure the maximum performance on each part.
The bath viscosity is close to that of water with little or no organic solvents in the coating bath.
No tool markers, die, bluing or coil markings. 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.
Autophoretic® Coating Process
Autodeposition and hot dip coating are based on two different coating principles. Pencil hardness of 6H to 7H. Withstands nicking and marring for better handling. High corrosion resistance Generally hrs. Since its inception, this unique process has been employed to coat billions of square feet of surface. Auutophoretic lower temperatures are required to cure the autodeposited parts.
Latex films form by coalescence.
The newly deposited organic film is adherent yet quite porous. Coats evenly on all surfaces; where it flows it coats with no runs or sags.
Thanks for the help. So I am very glad to join this discussion. But in case of electrocoating, the surface atom of the lattice may form bond with foreign atoms. Typically, autophoreic 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.
A by-product of the heat-treating process No adhesive bonding materials such as tape, epoxy, etc. Not compatible with aluminum or galvanized material. The coating thickness of the autodeposited film is time and temperature related. Thomas Moffitt Massachusett’s Office of Technical Assistance, Boston, MA Well, you have to remember that it is an organic coating, not a metallurgically bonded electroplating. On leaving the bath, the coating consists of two layers; one is a very coaging reacted layer; while the other is composed of undeposited excess polymer and activator from the bath.
Are there procedures in place to preclude hydrogen damage in such parts? Coating may be bent back on itself with no cracking or peeling.
This allows the coating dispersion to flow into and around the most complex shapes. Second line has just been commissioned for heavy vehicle brake plates. Orocess searching for any independent research about autodeposition coating. This process has been in commercial use since