1-羟基苯并三氮唑和钼酸钠对铜的缓蚀协同作用

采用电化学、扫描电子显微镜、X射线光电子能谱等实验方法研究了1-羟基苯并三氮唑（BTAOH）和钼酸钠（Na₂MoO₄）复配后对铜在ASTM D 1384模拟大气腐蚀溶液中的缓蚀协同作用.电化学实验结果表明：BTAOH与Na₂MoO₄在50mg·L^-1的质量浓度条件下，以2：1复配使用能够显著提高铜在模拟大气腐蚀溶液中的电荷转移电阻，降低腐蚀电流密度，缓蚀率达到90.7%；铜在模拟大气腐蚀溶液中的腐蚀产物呈聚集柱状堆砌在表面，而在含有缓蚀剂的溶液中表面平整致密，且疏水性增强，接触角显著增大至91.8°.X射线光电子能谱结果显示Na₂MoO₄与铜表面作用后形成MoO₃和MoO₂，两种氧化物填充在BTAOH形成的表面膜的缝隙中，提高了膜的致密性，对铜产生良好的保护作用.

Corrosion inhibition synergistic effect of 1-hydroxybenzotriazole and sodium molybdate on copper

A synergistic effect of 1-hydroxybenzotriazole and sodium molybdate as corrosion inhibitors on copper in ASTM D 1384 simulated atmospheric corrosion solution was investigated by using electrochemistry, scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Electrochemistry results revealed that BTAOH and Na₂MoO₄ compounding in 2 to 1, under the condition of a 50 mg×L-1 concentration, could improve the charge transfer resistance and reduce the corrosion current density, and the inhibition rate significantly reached to 90.7%. Corrosion products of copper in this simulated atmospheric corrosion solution piled up on the copper surface in an accumulative column shape; but the copper surface was smooth and dense in the corrosion inhibitor containing media, the hydrophobicity enhanced, and the surface contact angle significantly increased to 91.8°. X-ray photoelectron spectroscopy (XPS) results showed that Na₂MoO₄ transformed into MoO₃ and MoO₂ after interaction with copper, and two kinds of oxides padded in the gap of a surface film formed by BTAOH, which increased the density of the film and had good protective effect on copper.