研究钨酸钠对AZ61镁合金在3.5%NaC l腐蚀介质中的缓蚀作用.电化学阻抗谱(EIS)、Tafel极化曲线、扫描电子显微镜(SEM)等测试表明,钨酸钠缓蚀剂可有效抑制镁合金在NaC l介质中的腐蚀,当钨酸钠浓度为0.01 mol.L-1可达到较好的缓蚀效果,缓蚀效率达75.5%.钨酸钠可参与镁合金表面膜的形成,使表面膜更致密,从而抑制镁合金的腐蚀;其缓蚀作用属于阳极抑制型缓蚀机理.
李凌杰
,
姚志明
,
雷惊雷
,
贺东海
,
张胜涛
,
潘复生
. 钨酸盐对镁合金在3.5%NaCl介质中的缓蚀作用[J]. 电化学, 2008
, 14(4)
: 427
-430
.
DOI: 10.61558/2993-074X.1936
Electrochemical impedance spectroscopy(EIS),Tafel polarization curves and scanning electron microscopy(SEM) were used to study the corrosion inhibition of AZ61 magnesium alloy in 3.5% NaCl medium with tungstate.Results showed that tungstate demonstrates strong inhibition to the corrosion of AZ61 magnesium alloy.At the concentration of 0.01 mol/L,tungstate has a high inhibition efficiency 75.5%.Tungstate is an anodic inhibitor that mainly inhibited the anodic reactions of magnesium alloy through forming a compact protective layer that covered the magnesium alloy surface active sites.
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