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 <h1 class="p15-infocontent-1-tit"> 金属涂装在喷漆涂装工艺上的创新 </h1> 
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  <span> 发布日期： 2018.05.29 </span> 
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 <div class="p15-infocontent-1-con endit-content"><p style="text-indent:2em;">
    金属表面<a class="attach inline_attach" href="https://www.pk316.com/product/ptsb.html" target="_blank">喷漆涂装工艺</a>是一种很重要的金属防腐蚀保持手段。良好的喷漆涂装保护层保持连续完整无损，结合良好，能够成为抑制腐蚀介质侵入的屏障。但是由于腐蚀是不可逆转的自发过程，即使是很好的喷漆涂装保持层，也难于保护金属不发生腐蚀，尤其是当金属表面喷漆涂装层结合不良，受到损坏，或有针孔，鼓泡、龟裂、脱落等缺陷，喷漆涂层的保护作用将大大下降，甚至造成金属腐蚀加剧的恶果。所以对喷漆涂装金属腐蚀因素进行认真分析，并采取有效的对策预防是十分必要的。
</p>
<p style="text-indent:2em;">
    一般讲，金属的腐蚀是多种因素共同作用的结果，而其中某种因素在腐蚀过程中起着重要的作用。金属表面喷漆形成涂装保护层，其金属发生腐蚀的区域是在涂装漆膜与金属表面的界面区域，并不断向金属基体深处腐蚀扩张。
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</p>
<p style="text-indent:2em;">
    若金属表面喷漆涂装层能够有效地隔离水，氧以及电子、杂散离子等的渗透，就可以大大减缓或避免发生涂装金属的腐蚀，若隔离效果不佳，则涂装保持层对金属的防腐抗蚀保护作用就不好。生产实践表明，喷漆涂装保护层对水的渗透率严重妨碍金属喷漆涂装表层的附着力，而氧的渗透率则很大程度上妨碍金属的腐蚀性能。喷漆涂装金属的腐蚀形式多种多样，但根本原因，腐蚀的发生都与化学和电化学作用有着密切的关系。
</p>
<p style="text-indent:2em;">
    金属表面喷漆涂装前的净化脱脂，活化除锈等前处理及表面处理工艺的应用都可以有效地改善喷漆涂装金属的防腐抗蚀性能。生产实践证实喷漆涂装金属防腐性的优劣与其涂装前基体前处理质量的好坏妨碍极大，金属(尤其是铸件)表面涂装前所进行的有效除油脱脂，除锈或采用喷砂喷丸等可以引起净化活化表面，保证涂装漆膜与基体金属良好的结协力，对进步喷漆涂装金属的耐腐蚀性能是十分有益的。
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