当腐蚀浸泡的时间大于120分钟后，腐蚀产物在铝合金表面产生了明显的位阻作用，从而使腐蚀速率逐渐下降，直至48小时后，腐蚀速率趋于一相对稳定的数值。
Because of the place obstruction of corrosion products in the surface of the alloys, while corrosion time is at 120 minutes above, the corrosion rate descends to the stable value in 48 hours.
简介了位阻胺光稳定剂(HALS)的作用原理及涂料工业中常用HALS的结构及性能。
HALS light stabilizer action and principle, together with conventional HALS structure and property in paint and coatings industry are briefly introduced.
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