Corrosion Behaviour of Mg-7.3Al Alloy in Buffered Chloride Solutions

摘要：

The Corrosion behaviour of Mg-7.3Al alloy in buffered chloride solutions was investigated in the paper. The corrosion resistances of Mg-7.3Al alloy were evaluated in different borate capacity and pH by immersion test and polarization curves. The influences of immersion time, pH and buffer borate capacity were analyzed. The results revealed that the corrosion rate of Mg-7.3Al alloy depends on the pH of corrosive solution and has no relationship with buffer capacity. In the pH 6.5 and 2g / L buffer solution, the morphologies of Mg-7.3Al alloy consist of porous pits and protuberant second phases. There are seriously corroded area and macro-uncorroded area or protuberant second phases on the sample surface. The corossion potentials of the mg alloy is kept the same value in the pH 9 solution, regardless of borate capacity is 1g/Lor 2g/L, which are higher than that in the neutural chloride solution or acid solution (pH=6.5). Borate may play an inhibition role for mg alloy by the quick corrosion test of polarisation curves.

关键词： Mg-7.3Al alloy corrosion behaviour buffer chloride ions

作者: Suqiu Jia Wenke Gao Zhankui Zhao

作者单位: Key Laboratory of Advanced Structural Materials, Ministry of Education , Changchun University ofTech Jilin Science and Technology Vocational College, Changchun, 130123, China Key Laboratory of Advanced Structural Materials, Ministry of Education , Changchun University of Tec

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 11-16

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）