芳香醛在磷酸中对冷轧钢的缓蚀作用
Inhibition Effect of Aromatic Aldehydes on Cold Rolled Steel in H3PO4 Solution
摘 要
用失重法和动电位极化曲线法研究了在3.0 mol/L H3PO4中三种芳香醛原儿茶醛(3,4-二羟基苯甲醛)、香兰醛(4-羟基-3-甲氧基-苯甲醛)和肉桂醛(3-苯基-丙烯醛)对冷轧钢的缓蚀作用.结果表明:三种芳香醛对钢的缓蚀率随芳香醛的浓度增加而增大,为阴极抑制型缓蚀剂,且在钢表面的吸附符合Langmuir吸附校正模型；三种芳香醛的缓蚀率排序为:肉桂醛>香兰醛>原儿茶醛.
钢
芳香醛
原儿茶醛
香兰醛
肉桂醛
吸附
缓蚀
phosphoric acid
steel
aromatic aldehyde
protocatechualdehyde
vanillin
cinnamaldehyde
adsorption
inhibition
Abstract
The inhibition effect of three aromatic aldehydes of protocatechualdehyde (3,4-dihydroxy-benzaldehye),vanillin (4-hydroxy-3-methoxy-benzaldehyde) and cinnamaldehyde (3-phenyl-acraledehyde) on cold rolled steel (CRS) in 3.0 mol/L H3PO4 solution was investigated by weight loss and potentiodynamic polarization curve methods.The results showed that the inhibition efficiency (IE) of aromatic aldehydes increased with the increase of inhibitor concentration and the aromatic aldehydes were cathodic-type inhibitors.The adsorption of aromatic aldehydes on CRS surface obeyed the amended Langmuir adsorption isotherm equation.IE values followed the order:cinnamaldehyde>vanillin>protocatechualdehyde.
中图分类号 TG174.42
所属栏目 试验研究
基金项目 西南林学院重点科研基金项目(110605)
收稿日期 2008/1/6
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: LI Xiang-hong,DENG Shu-duan,FU Hui,MU Guan-nan. Inhibition Effect of Aromatic Aldehydes on Cold Rolled Steel in H3PO4 Solution[J]. Corrosion & Protection, 2009, 30(2): 102～105
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【4】孙蕾,曹楚南,林海潮,等.盐酸介质中苯扎溴铵在铁表面的吸附行为及其与肉桂醛的协同缓蚀作用[J].腐蚀科学与防护技术,1997,9(1):29-33.
【5】周欣,何晓英,伍远辉,等.肉桂醛对X60碳钢的缓蚀行为的电化学研究[J].西华师范大学学报(自然科学版),2003,24(4):434-436.
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【9】曹楚南.腐蚀电化学原理(第二版)[M].北京:化学工业出版社,2004:235-238.
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