DURABILITY OF STEEL BRIDGE METALLIC COATING SYSTEMS FOR COMBINED CYCLIC CORROSION TESTS WITH SALT WATER SPRAY AND ACID RAIN SPRAY

Abstract

In this study, durability of hot dip galvanizing, zinc-aluminum alloys, zinc-aluminum pseudoalloys and aluminum alloys was examined by salt water spray and acid rain spray combined cyclic corrosion tests. The differences of deterioration characteristics between the salt water spray and acid rain spray combined cyclic corrosion tests were investigated. As a result of the test, it is clarified the coating thickness loss of zinc hot dip galvanizing, zinc-aluminum alloys, and aluminum alloys by acid rain spray combined cyclic corrosion test was larger than that one by salt water spray test combined cyclic corrosion test.