苏方腾
,
蔡长寿
,
张惠平
,
温国谋
腐蚀科学与防护技术
测定了有机涂层的种类和厚度以及防锈颜料对Fc/有机涂层-Cu电偶腐蚀的影响。结果表明,涂层或涂层中活性颜料的防腐蚀性能愈强,电偶电流升至1微安/厘米~2所需的时间愈长。电偶的阴极对阳极的面积比值并不影响电偶电流密度。涂装酚醛涂层后,铁在氯化钠溶液中的阳极极化曲线和阴极极化曲线都呈现极限扩散电流的特征,这一电极行为决定了电偶的腐蚀特点。
关键词:
有机涂装
,
Galvanic corrosion
,
Pigment
,
Inhibitor
Xiao Tang
材料科学技术（英）
A numerical analysis of galvanic corrosion of hot-dip galvanized steel immersed in seawater was presented. The analysis was based on the boundary element methods (BEMs) coupled with Newton-Raphson iterative technique to treat the nonlinear boundary conditions, which were determined by the experimental polarization curves. Results showed that galvanic current density concentrates on the boundary of steel substrate and zinc coating, and the sacrificial protection of zinc coating to steel substrate results in overprotection of steel cathode. Not only oxygen reduction but also hydrogen reduction could occur as cathode reactions, which probably led up to the adsorption and absorption of hydrogen atoms. Flat galvanized steel tensile sample shows a brittle behavior similar to hydrogen embrittlement according to the SSRT (show strain rate test) in seawater.
关键词:
Galvanic corrosion
,
null
,
null
,
null
,
null
薛华实
,
徐乃欣
,
张承典
,
陈月贞
,
沈怡韵
中国腐蚀与防护学报
针对活性γ型宫内节育器,研究了在pH6～8的生理盐水中消炎痛对铜与不锈钢的电偶腐蚀的影响。消炎痛不影响铜的自然腐蚀电位及其随溶液pH的升高而正移的规律;它使不锈钢的自然腐蚀电位略有正移,但不改变其随溶液pH的升高而负移的趋势。对于铜/不锈钢电偶,消炎嫡不改变铜的阳极行为,但使不锈钢的阴极极化曲线正移;添加消炎痛使电偶电流明显增大。不锈钢可能出现活化状态,这时如与铜偶合,铜就成为阴极,从而抑制铜的腐蚀。消炎痛虽使不锈钢的电位略有正移,但不改变它原来的钝化状态或活化状态。
关键词:
电偶腐蚀
,
Copper
,
Stainless steel
,
Indomethacin
,
Intrauterine device
