研究了我国水下机器人用材POD919与LD31铝合金在3.5%NaCl溶液中的腐蚀性能,测定了铝合金的阴极保护参数及不同系列的牺牲阳极的电化学性能,并选择了合适的牺牲阳极.针对机器人内部构件的紧凑性与复杂性,研究了隙缝尺寸对实施阴极保护的影响,提出了对不同构件采用的电化学保护措施.
A study on corrosion and cathodic protection of aluminum alloys POD919 and LD 31 used for deepsea submarine robot was carried out in 3.5% NaCl solution.The related electrochemical parameters of three series of sacrificial anodes were determined by constant current discharge method.The results showed that a zinc alloy sacrificial anode was suitable to the protection of submarine robot.Considering the compactness and complexity of the internal structure of the robot,the effects of crevice dimension on cathodic protection ere also studied.The smaller the crevice dimension,the shorter the protection distance.Based on the achieved results,a proposal concerning the design of the cathodic protection system for robot is suggested.
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