摘要
以海洋常用铝基牺牲阳极为对象,研究了深水压力、流速和二者同时作用下Al-Zn-In牺牲阳极的自腐蚀现象。结果表明,深水压力和流速均促进了Al-Zn-In牺牲阳极自腐蚀,但程度有所不同,流速的作用明显大于深水压力。在深水压力作用下Al-Zn-In牺牲阳极腐蚀坑的直径和深度增大,在流速作用下腐蚀坑数量明显增加,电化学反应电阻降低,另外流水对阳极基体的机械冲刷加剧了晶粒脱落,在深水压力-流速交互作用下显著促进阳极自腐蚀。
The effect of synergy of water pressure and water flow on the free-corrosion behavior of Al-Zn-In alloy, a common Al-based sacrificial anode material, was studied via a home-made test set for regulating water pressure and flow rate aiming to simulate the deep-sea environment. The results show that both the water pressure and water flow could promote the free-corrosion of the Al-Zn-In sacrificial alloy. The effect of the water flow is obviously greater than that of water pressure. Under high water pressure, the diameter and depth of the corrosion pits increased. By high water flow rate, the number of pits increased significantly, and the electrochemical reaction resistance decreased. In addition, the erosion effect of flowing water on the alloy substrate may enhance the falling-off process of grains from the alloy.Generally, the free-corrosion of Al-Zn-In sacrificial alloy is significantly enhanced in the presence of synergetic effect of electrochemical corrosion and water erosion.
作者
张睿
崔宇
刘莉
王福会
ZHANG Rui;CUI Yu;LIU Li;WANG Fuhui(Shenyang National Laboratory for Materials Science,Northeastern University,Shenyang 110819,China;Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2023年第2期329-336,共8页
Journal of Chinese Society For Corrosion and Protection
基金
国家自然科学基金(U20b2026)。
关键词
深水压力
流速
牺牲阳极
自腐蚀
hydrostatic pressure
flow
sacrificial anode
self-corrosion
