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首页> 外文期刊>Materials transactions >Influences of Concentrations of H{sub}2SO{sub}4 and NaCl on Stress Corrosion Cracking of SUS304 Stainless Steel in H{sub}2SO{sub}4-NaCl Aqueous Solutions
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Influences of Concentrations of H{sub}2SO{sub}4 and NaCl on Stress Corrosion Cracking of SUS304 Stainless Steel in H{sub}2SO{sub}4-NaCl Aqueous Solutions

机译：H {sub} 2SO {sub} 4和NaCl的浓度对H {sub} 2SO {sub} 4-NaCl水溶液中SUS304不锈钢应力腐蚀开裂的影响

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摘要

A stress corrosion cracking (SCC) test was carried out at room temperature in aqueous solutions containing both H{sub}2SO{sub}4 (0-5.5 kmol m{sup}(-3)) and NaCl (0-4.5 kmol m{sup}(-3)), in order to study the influences of both solutes on the corrosion type of SUS304 steel The two solutes have synergistic influence on the corrosion type, that is, SCC and general corrosion occur within a specific concentration range and elsewhere, respectively. For a constant H{sub}2SO{sub}4 concentration the mass loss of corrosion shows a V-shape when it is plotted against NaCl concentration. On the other hand, maximum crack length of the SCC increases with increasing NaCl concentration up to a certain value, and then decreases. This gives a nearly inverse V-shape curve. In addition, the NaCl concentration ranges for the minimum mass loss and for the maximum crack length are almost the same. It was also confirmed that NaCl concentrations showing the minimum mass loss and the maximum crack length are inversely proportional to H{sub}2SO{sub}4 concentrations.
机译：在包含H {sub} 2SO {sub} 4（0-5.5 kmol m {sup}（-3））和NaCl（0-4.5 kmol m的水溶液）的室温下进行应力腐蚀开裂（SCC）试验{sup}（-3）），以研究两种溶质对SUS304钢腐蚀类型的影响两种溶质对腐蚀类型具有协同影响，即SCC和一般腐蚀发生在特定的浓度范围内，并且分别在其他地方。对于恒定的H {sub} 2SO {sub} 4浓度，腐蚀质量损失相对于NaCl浓度绘制为V形。另一方面，SCC的最大裂纹长度随着NaCl浓度的增加而增加到一定值，然后减小。这给出了几乎相反的V形曲线。此外，最小质量损失和最大裂纹长度的NaCl浓度范围几乎相同。还证实了显示最小质量损失和最大裂纹长度的NaCl浓度与H {sub} 2SO {sub} 4浓度成反比。

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