Production & Quality
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PA6 Chemical Resistance Boundary
Fenómeno do problema
PA6 parts contacting strong acids or oxidants show surface corrosion and a sharp drop in strength, while contacting oils and greases is harmless
Análise das causas
PA6 is resistant to oil, fuel, and most solvents, but the amide bond is not resistant to strong acids and oxidants and is rapidly degraded; misjudging the chemical environment during material selection leads to batch early failure
Solução
①For chemical contact scenarios, first conduct compatibility verification; ②for strong acid and oxidant environments, switch to PP or fluoroplastics; ③PA6 can be used with confidence in fuel and engine oil environments; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Conclusão principal
PA6's chemical resistance is a selective advantage; the boundary of oil resistance but not strong acid resistance must be confirmed item by item in the material selection review; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
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