Material Analysis
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ASA environmental stress cracking assessment missing
Fenómeno del problema
ASA products crack in batches in specific chemical environments, environmental stress cracking assessment was not done at the material selection stage, and post-remediation costs are high.
Análisis de la causa
Although ASA has better environmental stress cracking resistance than PC, it is still sensitive to specific solvents and hydrocarbons; material selection relied only on general chemical resistance tables without actual medium immersion verification; stress level and medium jointly determine cracking time.
Solución
①Perform immersion stress cracking tests with actual contact media at the material selection stage; ②solidify low-stress process for products; ③establish a prohibited chemical list and train the site; ④perform medium traceability analysis on cracked parts.
Conclusión clave
The environmental stress cracking risk of ASA must be assessed by actual testing; general data from chemical resistance tables cannot replace working condition verification; on-site chemical management is a long-term line of defense.
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