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首页> 外文期刊>International Journal of Electrochemical Science >Corrosion behavior of incoloy825 alloy in 3.5% NaCl solution containing different concentrations of NaHSO3
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Corrosion behavior of incoloy825 alloy in 3.5% NaCl solution containing different concentrations of NaHSO3

机译：Incoloy825合金在3.5％NaHSO 3 浓度的NaCl溶液中的腐蚀行为

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The corrosion behavior of incoloy825 alloy in 3.5% NaCl solution containing different concentrationsof NaHSO 3 was studied using electrochemical measurements, wet/dry cycle corrosion test and surfaceanalysis technology. The results show that the corrosion potential shifts negatively, and then movespositively with the increase of NaHSO 3 concentration. Meanwhile, the film resistance R f and chargetransfer resistance R ct both decline firstly and then rise as the concentration change. And theanode polarization curves display different characteristics of passivation or activation. As theincreasing concentration of NaHSO 3 , the corrosion rate of alloy increases firstly and then decreases. Inthe solution, the corrosion form of the alloy is mainly pitting corrosion, and the addition of NaHSO 3increases the degree of pitting. The variation of the corrosion resistance as the increase of NaHSO 3concentration may be attributed to the combined actions of solution acidification and competitiveadsorption.
机译：使用电化学测量，湿/干循环腐蚀试验和表面分析技术研究了incoloy825合金在3.5％NaCl浓度不同的NaHSO 3溶液中的腐蚀行为。结果表明，随着NaHSO 3浓度的增加，腐蚀电位向负方向移动，然后向正方向移动。同时，膜电阻R f和电荷转移电阻R ct随浓度变化先下降然后上升。阳极极化曲线表现出不同的钝化或活化特性。随着NaHSO 3浓度的增加，合金的腐蚀速率先升高后降低。在溶液中，合金的腐蚀形式主要是点蚀，而NaHSO 3的加入会增加点蚀的程度。随着NaHSO 3浓度的增加，耐腐蚀性的变化可能归因于溶液酸化和竞争性吸附的联合作用。

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