Growing the Wide World of 300 Series Aluminum

摘要

Gas Pickup and Degassing - It is generally agreed that adding strontium does not result in any appreciable gas pickup. The evidence regarding the effect of modifiers on gas pickup from the atmosphere is less clear, however. Experiments with small melts held under atmospheres having a controlled humidity have shown that strontium additions do increase the gas by changing the composition of the oxide on the melt surface. Other laboratory experiments have suggested that strontium has no effect.