摘要
研究了12种铜合金在青岛海域飞溅区暴露16年的腐蚀结果及其腐蚀行为和规律.铜合金在飞溅区的腐蚀率均较低.在飞溅区短期暴露,铜合金的腐蚀类型为均匀腐蚀,长期暴露的铜合金发生较轻的点蚀和缝隙腐蚀,黄铜有脱锌腐蚀倾向,白铜有脱镍腐蚀倾向.纯铜和青铜的腐蚀率随暴露时间增加而降低.HMn5 8- 2和HSn6 2 - 1短期暴露的腐蚀率随暴露时间增加而降低,长期暴露腐蚀率出现上升的趋势.HAl77- 2和BFe10 - 1- 1的腐蚀率随暴露时间增加而略有增加.长期暴露的HAl77- 2、BFe10 - 1- 1和BFe30 - 1- 1的耐蚀性比纯铜差.铜合金在飞溅区的腐蚀比全浸区、潮汐区轻。
Corrosion results of 12 types of copper alloys exposed to marine splash zone at Qingdao Sea area of China were reported.Corrosion behavior and law of copper alloys in splash zone was summarized.Corrosion rate of copper alloys in splash zone was low.Corrosion type of copper alloys was uniform corrosion in splash zone for short period exposure.Exposing to splash zone for long period,copper alloys occurred not serious pitting and crevice corrosion.Their maximum pitting depths in splash zone at Qingdao Sea area for 16 years were less than 0.3mm.Brass had tendency of dezincification corrosion; and Cu-Ni alloys took place denickel corrosion.Corrosion rate of pure copper and bronzes fell with exposure time.Corrosion rate of HMn58-2 and HSn62-1 exposed to splash zone during 1～4 years fell with exposure time,after which the corrosion rate raised with exposure time.Corrosion rate of HAl77-2 and BFe10-1-1 rose slowly with exposure time.Exposing to splash zone for long time,corrosion resistance of HAl77-2,BFe10-1-1 and BFe30-1-1 was poorer than that of pure copper.Corrosion resistance of copper alloys in splash zone was better than that in full immersion zone and tide zone,and was poorer than that in marine atmosphere.
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2005年第2期M065-M065,66-69,共5页
Journal of Chinese Society For Corrosion and Protection
基金
国家自然科学基金资助项目 (5 9899114 0 )
关键词
腐蚀
铜
海洋
飞溅区
corrosion,copper,marine,splash zone
