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首页> 外文期刊>Arabian Journal for Science and Engineering >THE EFFECT OF MOLECULAR WEIGHT ON THE CORROSION PROTECTION PROPERTIES OF POLYVINYLPYRROLIDONE POLYMERS ON STAINLESS STEEL
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THE EFFECT OF MOLECULAR WEIGHT ON THE CORROSION PROTECTION PROPERTIES OF POLYVINYLPYRROLIDONE POLYMERS ON STAINLESS STEEL

机译：分子量对不锈钢上聚乙烯吡咯烷酮聚合物腐蚀防护性能的影响

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摘要

The inhibitive effects of polyvinylpyrrolidone PVP10 (Mol.Wt. 10,000) and PVP45 (Mol.Wt 45,000) on the corrosion properties of 316L stainless steel at different inhibitor concentrations and temperatures were investigated. Electrochemical techniques were used to determine the corrosion properties. The inhibition effect of the polypyrrolidone was found to increase with the molecular weight. The lowest corrosion rate of 0.005M PVP45 reached 0.351 μmy, whereas the lowest corrosion rate for a 0.01 M PVP10 was 6.63 μmy. Ecorr. showed an increase in corrosion potential with increasing concentration of the inhibitor. The corrosion potential for a 0.01 M PVP10 reached a maximum of 0.26V after 72 hours compared to 0.32V for 0.005M PVP45. However, the curve of the PVP45 showed instability at different intervals of time indicative of frequent dissolutions/passivation processes. SEM reveals the formation of pits especially at low molecular weight of the polymers and fewer pits at 60℃ in the case of PVP45.
机译：研究了聚乙烯吡咯烷酮PVP10（分子量10,000）和PVP45（分子量45,000）在不同抑制剂浓度和温度下对316L不锈钢腐蚀性能的抑制作用。使用电化学技术确定腐蚀性能。发现聚吡咯烷酮的抑制作用随分子量增加。 0.005M PVP45的最低腐蚀速率达到0.351μmy，而0.01 M PVP10的最低腐蚀速率为6.63μmy。 Ecorr。随着抑制剂浓度的增加，腐蚀电位增加。 0.01 M PVP10的腐蚀电位在72小时后达到最大0.26V，而0.005M PVP45的腐蚀电位为0.32V。但是，PVP45的曲线在不同的时间间隔显示出不稳定性，表明频繁的溶解/钝化过程。扫描电镜显示，尤其是在低分子量的聚合物中，会形成凹坑，而在PVP45的情况下，在60℃时会形成较少的凹坑。

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