CHOOSING AN ACCELERATED CORROSION TEST

摘要

Accelerated corrosion tests are typically used to determine if a coating/substrate combination has been produced to yield a satisfactory service based on historical data from previous testing and field exposures of similar coating/substrate combinations. The intent is to find out, in a relatively short amount of time, what the appearance or performance of the product will be after several years of service. Real-life exposures are complicated events that may involve several factors including geometric configuration, porosity/adherence of corrosion product, soiling, abrasion, frequency of cleaning, cleaning procedures, cleaning chemicals, sun exposure, and temperature variations. Because of this, it is critical that the accelerated test chosen simulates "real-life" corrosion mechanisms as much as possible. The following guidelines were prepared to assist in choosing the best accelerated corrosion test for a given application.