METHOD FOR PREVENTING CORROSION IN ALUMINUM CONSTITUTION

摘要

PROBLEM TO BE SOLVED: To prevent corrosion caused by Cu ion in an aluminum constitution used in the seawater environment and whose surface is coated by an Al-Zn alloy film to prevent corrosion. SOLUTION: For excluding Cu ions from seawater in contact with an aluminum structure in advance, the Cu ions in seawater are immobilized by using H2S, a chelating agent or the like.