Substitutional inhibition mechanism of mild steel hydrochloric acid corrosion by hexylamine and dodecylamine

被引：85

作者：

Bastidas, JM ^{[1
]}

Polo, JL ^{[1
]}

Cano, E ^{[1
]}

机构：

[1] CSIC, Natl Ctr Met Res, Madrid 28040, Spain

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2000年 / 30卷 / 10期

关键词：

adsorption isotherm; dodecylamine; hexylamine; mild steel corrosion; projected molecular area;

D O I：

10.1023/A:1004036430497

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Hexylamine and dodecylamine were investigated as inhibitors of mild steel hydrochloric acid corrosion, in concentrations from 1 x 10(-6) to 1.0 M, at a temperature of 298 K. For a given inhibitor concentration, dodecylamine showed higher effectiveness than hexylamine. The inhibitor mechanism was treated as a substitutional adsorption process according to Flory-Huggins (FH), Dhar-Flory-Huggins (DFH) and Bockris-Swinkels (BS) isotherms. The best approach was obtained using FH and DFH isotherms, with one molecule of inhibitor replacing three molecules of water. A structural parameter, the projected molecular area of these two inhibitors, was calculated to elucidate inhibitor orientation in the adsorption process.

引用

页码：1173 / 1177

页数：5

共 17 条

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