Effects of Immersion Time and Temperature on the Corrosion of API 5L Grade X-65 Steel in 1.0 M H<sub>2</sub>SO<sub>4</sub> Pickling Solution

Asiful H. Seikh; El-Sayed M. Sherif

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Effects of Immersion Time and Temperature on the Corrosion of API 5L Grade X-65 Steel in 1.0 M H₂SO₄ Pickling Solution

机译：浸泡时间和温度对API 5L X-65钢在1.0 M H _{2 SO _{4 酸洗溶液中腐蚀的影响}}

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The aim of the present work was to report the effect of increasing the immersion time and the solutiontemperature on the electrochemical corrosion behavior of API 5L grade X-65 pipeline steel in 1.0 MH2SO4 pickling solutions using different experimental measurements. The potentiodynamicpolarization results showed that increasing the immersion time from 10 min to 60 min and further to 24h for the steel in the sulfuric acid solution before measurements increased the anodic and cathodiccurrents and corrosion current density (jCorr) and decreased the polarization resistance (Rp).Electrochemical impedance spectroscopy (EIS) measurements confirmed the polarization data that theincrease of immersion time decreases the solution and polarization resistances. Both polarization andEIS data also revealed that increasing the solution temperature in the range from 20 C to 60 C highlyincreased the corrosion of the X-65 steel due to the faster and contentious dissolution of the surfacewith temperature. Results collectively were consistent with others and proved clearly that the corrosionof the investigated steel in the 1.0 M H2SO4 solution increases with elongating the immersion time aswell as increasing the solution temperature.

机译：本工作的目的是使用不同的实验测量方法来报告延长浸渍时间和固溶温度对API 5L级X-65管线钢在1.0 MH2SO4酸洗溶液中的电化学腐蚀行为的影响。电位动力学极化结果表明，在测量之前，将钢在硫酸溶液中的浸没时间从10分钟增加到60分钟，再增加到24小时，则增加了阳极和阴极电流以及腐蚀电流密度（jCorr）并降低了极化电阻（Rp）。电化学阻抗谱（EIS）测量证实了极化数据，即浸没时间的增加降低了溶液和极化电阻。极化和EIS数据均还表明，由于表面温度随温度的升高迅速而有力地溶解，将固溶温度从20 C升高至60 C会极大地提高X-65钢的腐蚀。总体而言，结果与其他结果一致，并且清楚地证明，所研究的钢在1.0 M H2SO4溶液中的腐蚀随着浸入时间的延长以及溶液温度的升高而增加。

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《International Journal of Electrochemical Science》 |2015年第1期|共14页
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Asiful H. Seikh; El-Sayed M. Sherif;
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Effects of Immersion Time and Temperature on the Corrosion of API 5L Grade X-65 Steel in 1.0 M H2SO4 Pickling Solution

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Effects of Immersion Time and Temperature on the Corrosion of API 5L Grade X-65 Steel in 1.0 M H₂SO₄ Pickling Solution