Effect of synergies of K2Cr2O7, K2CrO4, NaNO2 and aniline inhibitors on the corrosion potential response of steel reinforced concrete in saline medium
Effect of synergies of K2Cr2O7, K2CrO4, NaNO2 and aniline inhibitors on the corrosion potential response of steel reinforced concrete in saline medium
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K2Cr2O7、K2CrO4、NaNO2和苯胺缓蚀剂协同作用对含盐介质中钢筋混凝土腐蚀电位响应的影响
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
C. Loto
中科院分区：
文献类型：
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作者：
O. Omotosho;J. Okeniyi;O. Ajayi;C. Loto
涉及腐蚀抑制剂性能的研究已被确定为提高混凝土结构耐久性的关键研究需求之一。本文研究了铬酸钾、亚硝酸钠和苯胺作为缓蚀剂在氯化钠介质中协同作用对混凝土中钢筋腐蚀的影响。采用开路电位腐蚀监测技术，对K2Cr2O7、K2CrO4、NaNO2和苯胺不同协同外加剂的钢筋混凝土试件进行部分浸入模拟海洋环境。对于所研究的每种抑制剂混合物的协同浓度，实验结果的统计模型的解释是使用 ASTM C876 完成的。根据这些模型排序，预测 3.0g (0.064 M) K2Cr2O7 + 4.5g (0.145M) K2CrO4 + 3.0g (0.272M) NaNO2 + 4ml (0.274M) 苯胺的协同组合对所考虑的氯化物介质中的钢筋混凝土的腐蚀表现出最佳的抑制质量。
Studies involving performance of corrosion inhibitors had been identified as one of the critical research needs for improving the durability of concrete structures. This paper investigates the effect of synergy on the performance of potassium chromate, sodium nitrite and aniline as inhibitors on the corrosion of steel-rebar in concrete in sodium chloride medium. The corrosion monitoring technique of the open circuit potential was employed for specimens of steel-reinforced concrete, with different synergistic admixtures of K2Cr2O7, K2CrO4, NaNO2 and Aniline, partially immersed in the marine simulating environment. Interpretation of the statistical modelling of the experimental results, for each of the synergistic concentrations of inhibitor admixtures studied, was done using ASTM C876. The modelled ranking from these predicted the synergistic combination of 3.0g (0.064 M) K2Cr2O7 + 4.5g (0.145M) K2CrO4 + 3.0g (0.272M) NaNO2 + 4ml (0.274M) Aniline as exhibiting optimal inhibiting quality on the corrosion of steel-reinforced concrete in the chloride medium considered.