Unverified90% confidenceDecision RuleTime unknown
潮湿环境（浴室/厨房/户外）必须选304不锈钢螺丝，碳钢镀锌螺丝在潮湿环境1-2年即锈蚀导致强度下降甚至断裂
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90%
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Long-term
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Unverified潮湿环境（浴室/厨房/户外）必须选304不锈钢或热镀锌螺丝，普通碳钢发黑/镀彩锌螺丝1-2年会锈蚀导致强度下降甚至断裂95% similarUnverified室外、卫浴、阳台等潮湿或淋雨环境应选304不锈钢膨胀螺丝，普通碳钢镀锌件在潮湿环境1~2年内易锈蚀导致连接失效92% similarUnverified潮湿环境（浴室、厨房、室外）必须选304不锈钢膨胀螺栓，普通镀锌铁质在潮气下1-2年即锈蚀导致膨胀力衰减；干燥室内墙体镀锌铁质即可满足92% similarUnverified潮湿环境（厨房水槽旁、卫浴）优先选不锈钢304或喷粉碳钢，避免普通电镀铁管；电镀层在接缝处易生锈起泡，1年内出现锈斑89% similarUnverified卫生间长期潮湿环境优先选304不锈钢管材，碳钢喷塑管一旦表面涂层刮破，2-3个月即从破损处锈蚀，承重结构安全性下降89% similar
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