Corrosion Behavior Studies on Copper, Zinc and Aluminum in Sulfur Containing Environment.

• Main Authors: Huang, Yulin, 黃鈺琳
• Other Authors: H.C.Shih
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/69q73h

碩士 === 中國文化大學 === 化學工程與材料工程學系奈米材料碩士班 === 100 === In this study, zinc, aluminum and copper, three basic metallic materials, according to the requirement of ISO as well as CNS, nearby the Beitou hot springs were evaluated. Two locations were selected; they are Dun-Xu Technical School and Xin-Min Junior High School, for the accommodation of the exposure facilities, based on their chemical of sulfur compounds and one location (Xin-Min Junior High School) even contains HCl. Analysis of weight loss, electrochemical polarization and surface analysis of the corrosion products were analyzed by XRD and XPS. The corrosion products pf zinc and copper are mainly composed of ZnS and ZnO for the zinc, and Cu2S, CuS, Cu2O and CuO for the copper; CuCl and CuCl2 are also observed at the exposure site of Xin-Min Junior High School. Aluminum only takes the oxide form of Al2O3 which is usually protective; no sulfide was observed on aluminum. It may conclude that aluminum is corrosion-resistant in sulfur containing environments. Based on the results up to a 90 days study, it is by no means a complete coverage of the corrosion products and continuously grow at this stage of observation. It is necessary to further keep on the track of the development of surface structure and chemistry of the exposures in the two test sites.