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首页> 外文期刊>Materials Sciences and Applications >The Effect of the pH of Ammonum Nitrate Solution on the Susceptability of Mild Steel to Stress Corrosion Cracking (SCC) and General Corrosion
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The Effect of the pH of Ammonum Nitrate Solution on the Susceptability of Mild Steel to Stress Corrosion Cracking (SCC) and General Corrosion

机译：硝酸铵溶液的pH值对低碳钢的应力腐蚀开裂（SCC）和一般腐蚀敏感性的影响

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This work investigates the relative aggressiveness of nitrate solutions at different pH values on mild steel towards stress corrosion cracking (SCC) and general corrosion. Electrochemical behavior and stress corrosion cracking sus-ceptibility measurements were carried out in 52 Wt% ammonium nitrate solutions at 368° K and various pH values ranging from 0.77 to 9.64. Constant load stress corrosion test at 90% yield stress was conducted. Tested specimens were prepared and examined using the scanning electron microscope (SEM). The potentiodynamic polarization curves for different pH values again emphasized the validity of the gravimetric measurements and hence the mechanism of cracking was attributed to the stress that assisted the dissolution process.
机译：这项工作研究了低pH值钢在不同pH值下硝酸盐溶液对应力腐蚀开裂（SCC）和一般腐蚀的相对侵蚀性。在52 Wt％硝酸铵溶液中在368°K和0.77至9.64的各种pH值下进行了电化学行为和应力腐蚀开裂敏感性测试。在屈服应力为90％的条件下进行了恒定负荷应力腐蚀试验。准备试样并使用扫描电子显微镜（SEM）进行检查。不同pH值的电位动力学极化曲线再次强调了重量分析法的有效性，因此开裂的机理归因于有助于溶解过程的应力。

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