Excerpt from Short-Term Evaluation Procedures for Coatings on Structural Steel After reviewing the literature and after talking with personnel at many different coating laboratories, it became apparent that the criteria stated in section are not applicable for assessing currently available accelerated aging tests. Current accelerated aging tests were developed using the concept of a comparison test as Opposed to predictability tests (section In comparison tests, specimens from multiple different coating systems are subjected to the same accelerated and outdoor test environments. The coating systems in both the accelerated and outdoor tests are then ranked. A good accelerated aging test is one in which the ranking is similar in both the accelerated and outdoor exposures. For a new coating system, the expected life is measured against control coatings exposed to the same environment. Control coatings are coatings having a known track record. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.