Accelerated Environmental Testing. A Study of Highway Structure Corrosion Problems and Metal Protective Coating Systems.

摘要

This report provides a description of the design and operation of an accelerated corrosion environmental chamber for metal protective paints and a discussion of the findings of experiments designed to test the reproducibility of results in the chamber and limited available direct correlations with data from an exterior weathering test fence at a tidal estuary in Brunswick,Georgia. The major conclusions reached were that the environmental chamber exhibits high precision of test results within runs and an exceptionally close similitude in a greatly accelerated test to the modes of panel failure observed in the field. The prospects for close lab-field correlation appeared very good,but,for general use,such correlation was seen to require control system techniques which have been proposed but not yet validated with comprehensive experimental studies. (Author)