When cast iron is added with Al, the compound layer formed by reaction between cast iron and liquid Zn at 500~600℃ consists of nubby δ +Fe-Al phases instead of column δ+г phases, and the width of the compound lay...When cast iron is added with Al, the compound layer formed by reaction between cast iron and liquid Zn at 500~600℃ consists of nubby δ +Fe-Al phases instead of column δ+г phases, and the width of the compound layer increases obviously. The consumption of Fe in cast iron is dominated by the diffusive rate of Fe through the compound layer, therefore, the corrosive rate of cast iron is decreased remarkably. With increasing the content of Al in cast iron, the corrosive rate of the cast iron further decrease. For the cast iron containing 8.1 wt.% Al, its corrosive rate is ten times as low as that of general gray cast iron.展开更多
Through sampling from different depth and different zones in the zinc bath, the size distribution of dross particles built during galvannealed (GA) production is analyzed and compared with that during galvanized (G...Through sampling from different depth and different zones in the zinc bath, the size distribution of dross particles built during galvannealed (GA) production is analyzed and compared with that during galvanized (GI) production. The relationship between the dross formation during transitions from GA to GI and the effective Al of the melt is discussed. Finally, the characteristics of dross particles in GA coating and its effects on GA punching and painting performances are studied.展开更多
文摘When cast iron is added with Al, the compound layer formed by reaction between cast iron and liquid Zn at 500~600℃ consists of nubby δ +Fe-Al phases instead of column δ+г phases, and the width of the compound layer increases obviously. The consumption of Fe in cast iron is dominated by the diffusive rate of Fe through the compound layer, therefore, the corrosive rate of cast iron is decreased remarkably. With increasing the content of Al in cast iron, the corrosive rate of the cast iron further decrease. For the cast iron containing 8.1 wt.% Al, its corrosive rate is ten times as low as that of general gray cast iron.
文摘Through sampling from different depth and different zones in the zinc bath, the size distribution of dross particles built during galvannealed (GA) production is analyzed and compared with that during galvanized (GI) production. The relationship between the dross formation during transitions from GA to GI and the effective Al of the melt is discussed. Finally, the characteristics of dross particles in GA coating and its effects on GA punching and painting performances are studied.