电感耦合等离子体原子发射光谱法测定铝镁环中硅锰铁钛铜磷

以盐酸和硝酸溶解铝镁环样品，选择Si212．412nm、Mn257．610nm、Fe238．204nm、Ti334．940nm、Cu324．752nm、P187．221nm作为分析线，采用基体匹配法绘制校准曲线消除基体效应的影响，使用电感耦合等离子体原子发射光谱法（ICP-AES）测定铝镁环中硅、锰、铁、钛、铜、磷。各待测元素校准曲线线性相关系数均大于O．999。方法中各待测元素的检出限为O．OO11～0．020μg／mL，测定下限为0．0037～O．O67μg／mL。按照实验方法测定样品中硅、锰、铁、钛、铜、磷，结果的相对标准偏差（RSD，n=6）为O．62％～3．1％；各元素的回收率在89％～116％之间。按照实验方法测定样品中硅、锰、铁、钛、铜、磷，测定值与分光光度法及原子吸收光谱法测定结果相吻合。

纳米二氧化铈对铝合金环氧镁铝复合涂层的防护作用研究

为了获得耐腐蚀性能较好的涂层,采用一定质量的铝粉代替镁粉,并添加纳米二氧化铈,制备了改性的铝合金表面环氧镁铝复合涂层。采用马丘测试、划叉浸泡实验、X射线衍射分析、扫描电子显微镜等方法,研究了镁粉、铝粉及二氧化铈对环氧镁铝复合涂层的防护作用,并得到二氧化铈与镁粉和铝粉的协同保护机理。结果表明:当镁粉质量分数为30%、铝粉质量分数为20%时,环氧镁铝复合涂层具有较好的耐腐蚀性能。纳米二氧化铈在涂层中的最佳填充量为5%时,可以增强复合涂层对铝合金基体的防护作用。镁粉、铝粉粒子在复合涂层中有大量的分布,粒径较大。少量的纳米二氧化铈粒子在复合涂层中呈球状分布、粒径较小,且涂层形貌均匀致密,屏蔽性能较好。改性后的复合涂层显著增强了铝合金在服役环境中的耐腐蚀性能。

Environmental impact assessment of magnesium alloy automobile hub based on life cycle assessment

In order to find out the impact of aluminum alloy hub replaced by the magnesium alloy hub on environment,the resource consumption,energy consumption and pollutant emission during hub production and their service life of the two types of hubs are investigated based on the life cycle assessment(LCA)theory.The results indicate that the adverse impact on environment can be effectively reduced by the application of magnesium alloy hubs.Compared with aluminum alloy hubs,the global warming potential(GWP)and human toxicity potential(HTP)are reduced by 39.6%and 24.0%,respectively.CO2 is the main pollutant in the life cycles of the two kinds of hubs,which is generated throughout the whole life cycle including the fabrication process and the service life,while the pollutants of particles mainly come from the fabrication stage.Compared with the aluminum alloy hubs,the green effect brought by magnesium alloy hubs is mainly due to the reduction of fuel consumption caused by weight loss.