Air, Soil, and Sea Galvanic Corrosion Investigation at Panama Canal Zone.

摘要

Various combinations of metals are used widely in military and industrial equipment. This paper considers the effects of subtropical environment on coupled, dissimilar structural metals of military interest, including: aluminum, brass, magnesium, Monel, steel, stainless steel, and titanium alloys. The environments are the atmosphere at Fort Sherman, soil (burial) at Fort Sherman, and seawater (total immersion) at Coco Solo, Panama Canal Zone. Results of this study should have significance in the selection of materials for design of equipment for use in these environments. The atmospheric specimens are rectangular, directly coupled, and offsetted. Offsetting was employed since this would lead to variability in galvanic effects over the exposed surfaces and edges. End grain attack, particularly at the edges of the tempered and aged light alloys, is of interest. For soil burial and seawater immersion, cylindrical specimens connected through a polyacrylate resin cylinder were used. The atmospheric specimens were placed at site in April 1973, and the soil and seawater specimens were located during Oct. 1973. Atmospheric tests are expected to continue for a total period of 4 years and soil, 5 years; seawater tests are likely to continue for a total of 3-1/2 years.