还会形成穿透型裂纹，造成镀层下本体金属的疲劳或应力腐蚀裂纹。
Through-thickness cracking also can lead to fatigue or stress corrosion cracking of the base metal beneath the plating.
但其不耐潮的特性则必需配用特别的屋面通风排潮系统，否则可能被腐蚀穿透而失去使用功能。
But its weak damp proofing requires that a special ventilated system and dampness damping system must be available, otherwise it could lose its functions due to erosive penetration.
结果表明，其本质是腐蚀介质穿透包铝层，使板材中心的合金产生晶间腐蚀，引起表皮肿胀。
The analysis result indicates that the corrosive penetrate through aluminium cladding and the interior alloy occurs intergranular corrosion. Therefore partial surface of plate swells.
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