C.S. Wu
,
Z. Zhang
,
F.H. Cao
金属学报(英文版)
The influence of chloride or sulphur dioxide on the corrosion behavior of copper tube
in the air-conditioning system was studied using scanning electron microscope (SEM),
energy dispersion spectrometer (EDS) and cyclic polarization techniques. The results
showed that the corrosion of copper tube are mainly caused by the SO4 and Cl ions
in the circulating water, and the former is mainly responsible for the general corrosion
of the copper tube whilst the latter for the pitting corrosion. The di®erent in°uences
of SO4 and Cl ions on the corrosion type of copper tube may be attributed to that
the radius of SO4 ion is much larger than that of Cl ion. Meanwhile the results
also indicated that SO4 inhibits the pitting corrosion caused by Cl and Cl inhibits
the general corrosion initiated by SO4 due to their competitive adsorption on the
copper matrix.
关键词:
copper
,
null
,
null
