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首页> 外文期刊>Corrosion Engineering, Science and Technology >Degradation of AISI304 stainless steel by atmospheric exposure in Saudi Arabia
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Degradation of AISI304 stainless steel by atmospheric exposure in Saudi Arabia

机译：暴露于沙特阿拉伯的空气中AISI304不锈钢的降解

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摘要

Stainless steel grade AISI304 is the largest tonnage alloy material used for industrial and domestic purposes in Saudi Arabia. The primary property, which determines its use in many applications, is its corrosion resistance in a wide variety of aqueous environments. The aim of this study is to evaluate the joint effect of marine and industrial pollutants on the atmospheric degradation of AISI304. The corrosion rate of specimens was determined after one, two, three and four years of exposure by weight loss. The time of wetness and deposition rates of atmospheric pollutants (Cl- and SO2) was also determined. The ISO 9223 standard for atmospheric aggressivity has been applied to the different test sites used. The results agreed well with the empirical kinetics equation of the form C=Ktn, where K and C are the corrosion losses in mg cm-2 after 1 and t years of the exposure respectively, and n is constant. Based on n values, the corrosion mechanism of AISI304 is predicted. Characterisation of the corrosion product layers was performed using X-ray diffraction. The results obtained show that the corrosion rate of AISI304 is a function of the chloride, SO2 pollution level and time of wetness.
机译：AISI304不锈钢等级是沙特阿拉伯用于工业和家庭用途的最大吨位合金材料。决定其在许多应用中用途的主要性能是其在各种水性环境中的耐腐蚀性。这项研究的目的是评估海洋和工业污染物对AISI304大气降解的共同影响。在暴露一年，两年，三年和四年后，通过失重确定样品的腐蚀速率。还确定了大气污染物（Cl -和SO 2 ）的湿润时间和沉积速率。 ISO 9223大气侵蚀性标准已应用于所使用的不同测试场所。结果与形式为C = Kt n 的经验动力学方程式吻合得很好，其中K和C是腐蚀后1年和t年的腐蚀损失，单位为mg cm -2 。曝光分别，并且n是常数。基于n值，可以预测AISI304的腐蚀机理。使用X射线衍射对腐蚀产物层进行表征。所得结果表明，AISI304的腐蚀速率是氯化物，SO 2 污染水平和润湿时间的函数。

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  • 来源
    《Corrosion Engineering, Science and Technology》 |2009年第4期|297-303|共7页
  • 作者

    Syed S.;

  • 作者单位

    Chemical Engineering Department, King Saud University, PO Box 800, Riyadh 11421, Saudi Arabia, Email: sabirsyed2k@yahoo.com;

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