Study on synergistic corrosion-inhibition between ozone and Cr(Ⅵ )
Received date: 2002-02-26
Online published: 2010-10-01
The corrosion rates of carbon-steel in ozone and Cr(Ⅵ )solutions are primarily investigated.The experiments proves that ozone and Cr(Ⅵ )show excellent synergistic corrosion-inhibition.The synergism is affected by the concentrations of ozone and Cr(Ⅵ ).The corrosion rates decrease while the concentrations of Cr(Ⅵ )increase.The optimum range for ozone in aqueous solutions is 0.05 ~ 0.1mg L.Within the range,an excellent corrosion-inhibition for carbon-steel is achieved while Cr(Ⅵ )is 2.5 ~ 5.0 mg L.The synergistic corrosion-inhibition is improved greatly while the carbon-steel is pretreated by potassium chromate solutions.
Key words: ozone; chromium(Ⅵ ); synergistic corrosion-inhibition
WANG Yeyao, WANG Zhansheng . Study on synergistic corrosion-inhibition between ozone and Cr(Ⅵ )[J]. Industrial Water Treatment, 2002 , 22(12) : 29 -31 . DOI: 10.11894/1005-829x.2002.22(12).29
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