This research was conducted to study the form of corrosion products of medium carbon steel under the exposure of Banda Aceh’s atmosphere. The medium carbon steel samples which the size based on ASTM G 50 were exposed in open areas around the Engineering Faculty, Syiah Kuala University, Darussalam - Banda Aceh, Aceh province, Indonesia. The study was carried out from January through December 2016. The corrosion product formed on the surface of the samples was studied using X-ray Diffraction (XRD) and Scanning Electron Microscope (SEM) method. Measurements of weight loss due to atmospheric corrosion as a basis for calculating corrosion rates was referring to ASTM Gl. Corrosion product found based on XRD analysis was lepidocrocite (FeO2, α-FeOOH) and goethite (FeO2, α-FeOOH). The results agreed with SEM analysis that also indicates to lepidocrocite and goethite. The corrosion rate for twelve months showed that the highest rate occurs in the period of March-April that was 0.024 mpy. During twelve months exposure, the corrosion products consist of lepidocrocite and goethite. Significant changes began to occur in the eighth month, where the product of corrosion was almost entirely goethite.
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机译:进行该研究,研究了在Banda Aceh气氛暴露下中碳钢的腐蚀产物的形式。基于ASTM G 50的尺寸的中等碳钢样品在工程学院,Syiah Kuala University,Darussalam - Banda Aceh,Aceh省,印度尼西亚的开放区域暴露。该研究于2016年1月至12月进行。使用X射线衍射(XRD)和扫描电子显微镜(SEM)方法研究样品表面上形成的腐蚀产物。由于大气腐蚀而导致的重量损失的测量作为计算腐蚀速率的基础是指ASTM GL。基于XRD分析发现的腐蚀产品是尿道(FeO2,α-FeOOH)和甲酸酯(FeO2,α-FeOOH)。结果同意SEM分析,也表明Lepidocroce和Geethite。十二个月的腐蚀速率表明,在3月至4月期间发生的最高率为0.024毫米。在12个月暴露期间,腐蚀产品由鳞片和甲酸盐组成。在第八个月开始发生重大变化,腐蚀的产品几乎完全是苍白的。
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