Galvanic Corrosion of Coated HY-130Steel Coupled to 5456Aluminum.

摘要

Specimens of HY-130steel were galvanically coupled to 5456-H117aluminum in natural sea water at velocities of 0to 30feet per second. The steel was coated with an epoxy primer and topcoat to various degrees:fully coated,coated with defect,partially coated,and uncoated. Corrosion rates of both materials increased with increasing sea-water velocity. Corrosion of the HY-130was reduced and that of the aluminum was increased when galvanically coupled,with the effect on the aluminum increasing with increasing amount of uncoated steel area. (Author)