Abstract:

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

摘要：

研究了碳钢在臭氧和Cr(Ⅵ)溶液中的腐蚀速率。试验结果表明，臭氧和Cr(Ⅵ)具有良好的协同缓蚀作用。这种协同缓蚀作用与臭氧质量浓度和Cr(Ⅵ)质量浓度有关，Cr(Ⅵ)质量浓度升高，协同缓蚀效果提高;协同缓蚀作用的最佳臭氧质量浓度范围为0。05～0。1mgL。在最佳臭氧质量浓度范围内，当Cr(Ⅵ)为2。5～5。0mgL时，碳钢可以取得较好的缓蚀效果。采用铬酸盐对碳钢进行预膜，可以有效提高臭氧与Cr(Ⅵ)的协同缓蚀效果。

关键词: 臭氧, Cr(Ⅵ), 协同缓蚀作用

CLC Number: 

• TQ085+.2