Painted steel surfaces, rusting degree

Method for evaluating degree of rusting on painted steel surfaces... 

Standard Reference Method for Making Potentiostatic and Potentiodynamic Anodic Polarization Measurements", ASTM G5-72. "Evaluating Degree of Rusting on Painted Steel Surfaces", ASTM D610-68. 

ASTM D610 - 89. Standard Test Method for Evaluating Degree of Rusting on Painted Steel Surfaces. 

The extent of protective paint loss can be determined using standard methods for evaluating the degree of rusting on steel surfaces (see ASTM D 610 and Ref 5) and paint coating degradation (ASTM D 660 , D 662 , D 714", and D 772 ). 

This specification covers the requirements for the hand tool cleaning of steel surfaces—removal of all rust scale, mill scale, loose rust, and loose paint to the degree specified by hand wire brushing, hand sanding, hand scraping, hand chipping, or other hand impact tools or by a combination of these methods. The substrate should have a faint metallic sheen and also be free of oil, grease, dust, soil, salts, and other contaminants. 

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