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首页> 外文期刊>International Journal of Electrochemical Science >Utilizing of Sodium Nitrite as Inhibitor for Protection of Carbon Steel in Salt Solution
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Utilizing of Sodium Nitrite as Inhibitor for Protection of Carbon Steel in Salt Solution

机译：利用亚硝酸钠作为盐溶液保护碳钢的抑制剂

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Preventing corrosive action induced by the presence of chlorine in utility water used as a coolant incooling towers is a challenging task. Anodic inhibition is one of the commonly used techniques forprotecting metallic parts of the cooling towers. In this study, the effect of chloride ions on the sodiumnitrite (NaNO2) inhibitor concentration was investigated for the protection of carbon steel pipes undercontrolled conditions of mass transfer. A rotating cylinder electrode system was utilized to providequantified hydrodynamic mass transfer conditions. Potentiostatic polarization experiments werecarried out at 313 K and rotational speeds of 0, 200, 350 and 500 rpm. It was selected a typicalindustrial chloride solution at a concentration of 250 ppm NaCl. The experiments were conducted inthe presence of NaNO2 with different concentrations depending on the [NaNO2/NaCl] molar ratio, i.e.ratios of 0 to 1. A new calculation was used to find the best protection value which depends on thepassive film stability in the polarization curve. The current analysis revealed that the new method forpredicting the optimum protection value is more reliable than the conventional corrosion currentdensity based technique.
机译：防止用作冷却剂冲洗塔的含氯的存在含氯的腐蚀作用是一个具有挑战性的任务。阳极抑制是用于保护冷却塔的金属部件的常用技术之一。在该研究中，研究了氯化物离子对亚硫酸钠（Nano2）抑制剂浓度的影响，以保护碳钢管在碳钢管的压缩条件下的传质。使用旋转圆筒电极系统来提供适用的流体动力传质条件。电位偏振实验在313 k和0,200,350和500rpm的转速下进行。它选择了浓度为250ppm NaCl的典型工业氯化物溶液。根据[纳米2 / NaCl]摩尔比，用不同浓度进行纳米2的实验，0至1的脂略苷。用于找到最佳保护值，这取决于偏振曲线中的载玻片稳定性。 。目前的分析表明，用于预测最佳保护值的新方法比传统的耐腐蚀基于基于技术更可靠。

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