EVALUATION OF AHT AS CORROSION-INHIBITOR FOR ALPHA-BRASS IN ACID CHLORIDE SOLUTIONS

被引：25

作者：

ELRAHMAN, HAA ^{[1
]}

机构：

[1] UNIV CAIRO,FAC SCI,DEPT CHEM,GIZA,EGYPT

来源：

CORROSION | 1991年 / 47卷 / 06期

关键词：

ALPHA-BRASS; BARRIER LAYER; CORROSION RESISTANCE; CURRENT TRANSIENT; INHIBITORS; POTENTIAL DECAY;

D O I：

10.5006/1.3585273

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion inhibition of alpha-brass (Cu/Zn:67/33) in acid chloride solutions by 3-amino-5-heptyl-1,2,4-triazole (AHT) was evaluated by weight-loss, polarization, and capacitance measurements. The percentage inhibition was found to increase with increase of AHT concentration and the maximum value was 96% at [AHT] = 10 mM. The inhibition is attributed to the formation of a barrier layer of AHT(Cu,C1) + Cu2O. The presence of such a layer affects the anodic and cathodic polarization curves, the electrode capacitance, and the corrosion potential. The results show that AHT acts preferentially as an anodic inhibitor. Long-time tests show that the percentage inhibition does not change noticeably with time in either stirred or stagnant solutions, being higher in stagnant solutions.

引用

页码：424 / 428

页数：5

共 35 条

[1] 3-PHENYL-1,2,4-TRIAZOL-5-ONE AS A CORROSION-INHIBITOR FOR COPPER [J].