Powder vs. E-coat Costs
Q. We are going to paint our stampings with either e-coat or powder. Which is cheaper? —A.G.
A. It depends. The material cost of applying powder or e-coat, for the same conditions of performance and quality, will depend on many specific factors, including film thickness, weight, square footage and geometry of the parts, annual volumes, and environmental costs. Typically, the larger the part and the greater the environmental costs, the more the cost analysis will favor the powder.
How do you measure the surface area of a threaded fastener? How much coating would you put on it? How thick of a coating? What about non-threaded fasteners? The U.S. Department of Agriculture’s Forest Service, of all people, may have come up with the solution for those pondering how to coat sometimes-difficult small pieces using computer imaging and software to compute the area.
A more realistic way to perform salt spray tests.
This paper is a peer-reviewed and edited version of a presentation delivered at NASF SUR/FIN 2012 in Las Vegas, Nev., on June 13, 2012.