摘要
为了提高太阳能储热容器的耐腐蚀性,利用重量损失法,SEM,XRD分析Ni-xFe在熔融NaCl-MgCl_2中的腐蚀行为,研究了Ni-xFe合金在520℃熔融NaCl-MgCl_2下的耐腐蚀性能,并确定出Ni-xFe合金最优的成分区间,分析了其腐蚀机理。结果表明:含Fe元素多的试样,质量损失多,表面存在较多的腐蚀孔洞,发生了严重的局部腐蚀;Ni含量较多的试样,表面的腐蚀孔洞分布均匀,质量损失较Fe含量多的试样低。说明Ni元素在Ni-xFe耐腐蚀性能方面起着有益作用。结合市场上纯Ni和纯Fe的成本因素,最终确定Ni-xFe的最佳成分区间质量分数为Ni-25%Fe。
In order to improve the corrosion resistance of solar energy heat storage vessel,The corrosion behavior of Ni-xFe in molten NaCl-MgCl2 was analyzed by weight loss method,SEM and XRD. The corrosion resistance of Ni-xFe alloy melted at 520 ℃ NaCl-MgCl2 was studied,and the optimum composition of Ni-xFe alloy was determined. The corrosion mechanism was analyzed. The experimental results showed that the samples with more Fe element had more mass loss,and there were more corrosion holes on the surface,which lead to serious local corrosion. In the samples with more Ni content,the corrosion holes on the surface were uniformly distributed,and the mass loss was lower than that of the samples with more Fe content,indicating that Ni was beneficial to the corrosion resistance of Ni-xFe. Combined with the cost factors of pure Ni and pure Fe in the market,the best component ratio of Ni-xFe was determined to be Ni-25 %Fe.
作者
向荣桥
贾红光
XIANG Rongqiao;JIA Hongguang(Department of Mechanical Engineering,Qinghai University,Xining 810016,China)
出处
《青海大学学报（自然科学版）》
2019年第2期73-77,共5页
Journal of Qinghai University(Natural Science)
基金
青海省科学技术厅项目(2016-ZJ-759)
