Effect of relative humidity on copper corrosion by acetic and formic acid vapours

被引：23

作者：

Cano, E ^{[1
]}

Bastidas, JM ^{[1
]}

机构：

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

来源：

CANADIAN METALLURGICAL QUARTERLY | 2002年 / 41卷 / 03期

关键词：

D O I：

10.1179/cmq.2002.41.3.327

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A comparative study is made of the copper corrosion rate and corrosion products originated by acetic and formic acid vapours at 40%, 80% and 100% relative humidity (RH) using gravimetric, scanning electron microscopy, X-ray powder diffraction and X-ray photoelectron spectroscopy techniques. Five acetic and formic acid vapour concentration levels (10, 50, 100, 200 and 300 ppm) were tested for a period of 21 days at 30 degreesC. The copper corrosion rate in the presence of acetic acid vapour was up to similar to0.002 mg/cm(2) day (mcd) for 40% RH, similar to0.07 mcd for 80% RH and similar to0.23 mcd for 100% RH. Formic acid vapours yielded a copper corrosion rate of up to similar to0.005 mcd for 40% RH, similar to0.03 mcd for 80% RH and similar to0.13 mcd for 100% RH. The main compounds found were cuprite (Cu2O), copper hydroxide (Cu(OH)(2)), copper acetate (Cu(CH3COO)(2)) and copper formate (Cu(HCOO)(2)).

引用

页码：327 / 336

页数：10

共 23 条

[1] A laboratory study of mild steel vapour phase corrosion and its inhibition by dicyclohexylamine nitrite [J].