In order to study the new anode materials for zinc electrowinning,Al/Pb?0.2%Ag rolled alloy was produced by composite casting and hot rolling.Then the effect of cooling ways on properties of Al/Pb?0.2%Ag rolled alloy ...In order to study the new anode materials for zinc electrowinning,Al/Pb?0.2%Ag rolled alloy was produced by composite casting and hot rolling.Then the effect of cooling ways on properties of Al/Pb?0.2%Ag rolled alloy was investigated.As the results of metallographic test indicated,with the increasing of cooling intensity,both Vickers hardness and yield strength of Al/Pb?0.2%Ag rolled alloy increase.Furthermore,the Al/Pb?0.2%Ag rolled alloy,cooled by ice salt,presents the finest grain size and shows the lowest oxygen evolution potential(1.5902V),while that of alloy cooled by water and air are1.6143V and1.6288V,respectively.However,the corrosion current density and corrosion rate of the Al/Pb?0.2%Ag rolled alloy,cooled by ice salt,are the highest.This can be attributed to its largest specific surface area,which promotes the contact between the anode and electrolyte.展开更多
大型水轮发电机的冷却方式主要有空冷、半水冷、全水冷和蒸发冷却4种方式。龙滩水电站水轮发电机单机视在功率达777.8 M V.A,通过对各种冷却方式优缺点的分析比较,并结合龙滩水轮发电机的特点,最终选用空冷方式。目前机组正在安装中,实...大型水轮发电机的冷却方式主要有空冷、半水冷、全水冷和蒸发冷却4种方式。龙滩水电站水轮发电机单机视在功率达777.8 M V.A,通过对各种冷却方式优缺点的分析比较,并结合龙滩水轮发电机的特点,最终选用空冷方式。目前机组正在安装中,实际运行效果还待投产后检验。展开更多
基金Projects (YNJJ2016012) supported by the Guangdong Jiana Energy and Technology Co.,Ltd-Central South University Joint Research Funding,China
文摘In order to study the new anode materials for zinc electrowinning,Al/Pb?0.2%Ag rolled alloy was produced by composite casting and hot rolling.Then the effect of cooling ways on properties of Al/Pb?0.2%Ag rolled alloy was investigated.As the results of metallographic test indicated,with the increasing of cooling intensity,both Vickers hardness and yield strength of Al/Pb?0.2%Ag rolled alloy increase.Furthermore,the Al/Pb?0.2%Ag rolled alloy,cooled by ice salt,presents the finest grain size and shows the lowest oxygen evolution potential(1.5902V),while that of alloy cooled by water and air are1.6143V and1.6288V,respectively.However,the corrosion current density and corrosion rate of the Al/Pb?0.2%Ag rolled alloy,cooled by ice salt,are the highest.This can be attributed to its largest specific surface area,which promotes the contact between the anode and electrolyte.
