不同流速海水中B10/H62电偶腐蚀规律  

Galvanic Corrosion Behavior of B10/H62 Couple in Seawater of Different Flowing Rate

作　　者：孙保库 李宁[2] 杜敏[3] 

机构地区：[1]浙江省海洋开发研究院,浙江舟山316100 [2]中国船舶重工集团公司第七二五研究所海洋腐蚀与防护国家重点实验室,山东青岛266071 [3]中国海洋大学化学化工学院,山东青岛266003

出　　处：《材料保护》2011年第7期20-22,7,共3页Materials Protection

摘　　要：H62黄铜与B10铜镍合金是船舶海水管路系统中广泛使用的电偶对,为了探讨其匹配性,研究了2种材料在01,,3,5 m/s流速海水中的电偶腐蚀行为。通过自然腐蚀电位监测、电偶腐蚀试验、三维视频显微镜考察了海水流速对2种材料电偶腐蚀倾向、电偶腐蚀规律和微观腐蚀形貌的影响。结果表明:在不同流速海水中,H62黄铜与B10间存在明显的电偶腐蚀倾向,H62作为阳极,腐蚀加剧,B10作为阴极受到保护。结果还表明,随海水流速增大,电偶腐蚀效应γ先减小后增大,于3 m/s海水中呈现极小值;电偶腐蚀流速敏感性因子λ逐渐增大;H62试样呈现出更为明显的冲刷腐蚀形貌。Galvanic corrosion behavior of brass(H62) and Cu-Ni alloy(B10)in seawater of different flowing rate(0,1,3,5m/s) was studied.The effects of seawater flowing rate on the galvanic corrosion tendency,rule and micro-morphology were investigated based on natural corrosion monitoring,galvanic corrosion test and three-dimensional video microscopy.It was found that in seawater of different flowing rate,H62 and B10 were liable to galvanic corrosion.H62 as the anode experienced accelerated corrosion,while B10 as the cathode was protected.In the meantime,with increasing flowing rate of seawater,galvanic corrosion effect was initially reduced but later increased,and the minimum galvanic corrosion effect was obtained in seawater with a flowing rate of 3m/s.Besides,the flowing rate sensitive factor of galvanic corrosion tended to increase with increasing seawater flowing rate,and the corroded surface of H62 was dominated by more prominent erosion.

关 键 词：电偶腐蚀 流动海水 B10铜镍合金 H62黄铜 

分 类 号：TG172.5[金属学及工艺—金属表面处理]