Natesan Mariappan, Selvaraj Subbiah, Manickam Tharmakkannu, Venkatachari Gopalachari
Corrosion Science and Engineering Division, Central Electrochemical Research Institute, Karaikudi-630006, TN, India and Department of Chemistry, Sri Paramakalyani College, Alwarkurichi-627 412, TN, India.
Sci Technol Adv Mater. 2008 Nov 14;9(4):045002. doi: 10.1088/1468-6996/9/4/045002. eCollection 2008 Dec.
This work deals with atmospheric corrosion to assess the degrading effects of air pollutants on ferrous and non-ferrous metals and alloys, which are mostly used as engineering materials. An exposure study was conducted in the Tuticorin port area located on the east coast of South India, in the Gulf of Mannar with Sri Lanka to the southeast. Common engineering materials, namely mild steel, galvanized iron, Zn, Al, Cu and Cu-Zn alloys (Cu-27Zn, Cu-30Zn and Cu-37Zn), were used in the investigation. The site was chosen where the metals are exposed to marine and industrial atmospheres. Seasonal 1 to 12 month corrosion losses of these metals and alloys were determined by a weight loss method. The weight losses showed strong corrosion of mild steel, galvanized iron, Cu and Zn and minor effect on Al and Cu-Zn alloys. Linear regression analysis was conducted to study the mechanism of corrosion. The composition of corrosion products formed on the metal surfaces was identified by x-ray diffraction and Fourier transform infrared spectroscopy.
这项工作涉及大气腐蚀，以评估空气污染物对黑色金属、有色金属及其合金的降解作用，这些金属和合金大多用作工程材料。在位于印度南部东海岸的杜蒂戈林港口地区进行了一项暴露研究，该地区位于马纳尔湾，东南部与斯里兰卡接壤。调查中使用了常见的工程材料，即低碳钢、镀锌铁、锌、铝、铜和铜锌合金（Cu-27Zn、Cu-30Zn和Cu-37Zn）。选择该地点是因为金属暴露于海洋和工业大气中。通过失重法测定了这些金属和合金在1至12个月的季节性腐蚀损失。失重表明低碳钢、镀锌铁、铜和锌受到强烈腐蚀，而对铝和铜锌合金的影响较小。进行线性回归分析以研究腐蚀机理。通过X射线衍射和傅里叶变换红外光谱法确定了金属表面形成的腐蚀产物的成分。
