If gas porosity in aluminum die-castings is caused by the die-casting release agent, it mainly stems from the following factors:
① Excessively concentrated release agent with high gas evolution: Appropriately increase the release agent’s dilution ratio to reduce gas generation.
② Prolonged spraying time and incomplete drying after air blowing: This easily leads to dense gas porosity—thorough drying after spraying is critical.
③ Formulation issues with the release agent itself: Using volatile release agents requires attention to the agent’s internal system (e.g., additive compatibility or volatility control) to minimize unintended gas release.
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