热镀锌钢表面多尺度、多技术表征及其对涂料附着力和起泡倾向的影响

K. Pélissier, D. Thierry
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引用次数: 2

摘要

众所周知,在应用有机涂层之前,镀锌钢的表面状态(清洁度,成分)是一个重要的参数。表面状态会影响整个体系的粘附性能,因此也会影响其耐腐蚀性和起泡的倾向。在应用预处理层之前,镀锌钢带通常进行碱性清洗。众所周知,这一步是去除热镀锌钢加工后形成的天然氧化膜,是研究表面性能对涂漆系统性能影响的最重要步骤之一。本研究的重点是利用清洁步骤来输入表面成分(主要是铝的表面浓度)的可变性,并评估其对整个涂料系统性能的影响。结果表明,通过清洁步骤可以实现表面铝浓度的变化,并且在表面铝含量低的情况下,附着力和起泡倾向方面的性能改善迹象被发现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multiscale and Multi-Technical Approach to Characterize the Hot-Dip Galvanized Steel Surface and Its Consequence(s) on Paint Adhesion and Tendency to Blistering
It is well known that the surface state (cleanliness, composition) of galvanized steel prior to the application of an organic coating is an important parameter. The surface state will affect the adhesion properties of the complete system and therefore will also impact its corrosion resistance and its tendency to blistering. Before the application of a pretreatment layer, galvanized steel strips are normally alkaline cleaned. This step is known to remove the native oxide film formed on hot dip galvanized steel after processing and appears as one of the most important steps to study the impact of the surface properties on the performance of painted systems. This study focused on making use of the cleaning step to input a variability on the surface composition (mainly surface concentration of aluminum) and evaluate its consequence(s) on the performance of a complete paint system. The results showed that, a variability in terms of surface aluminum concentration could be achieved by the cleaning step and that signs of performance improvement in terms of adhesion and tendency to blistering were spotted with a low content of aluminum at the surface.
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