LOCALIZED CORROSION OF COPPER AND ITS ALLOYS IN SEAWATER AT FOUR TEST SITS ALONG CHINA COAST FOR 16 YEARS
铜及铜合金在我国实海海域暴露16年局部腐蚀规律

The regulation of localied corrosion of 2 kinds of copper and 17 kinds of copper alloys exposed in seawater at test sites of Qingdao,Zhoushan,Yulin and Xiamen for 16 years has been studied.Results show that during immersion in the seawaters,copper alloys suffered from pitting corrosion due to high temperature and marine living adhesion at Yulin,and due to higher flow velocity of seawater containing sand at Zhoushan.However,the seawater at Xiamen seems to prohibit pitting corrosion of copper alloys,so that no pitting corrosion was observed for copper alloy plates tested there.The copper alloys suffered from more serious pitting corrosion in the mean tide zone than that in the immersion zone at Qingdao during the later exposure stage.