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靜電噴塗設備的防腐原理有哪些方面？

返回列表 作者：鵬鲲靜電噴塗設備编辑： 400-088-0769/180-2525-7959 来源： www.pk316.com 发布日期： 2020.07.08

許多客戶都在想我這條靜電噴塗設備修修补补还能将就用，确实这样在一定的时间里能为企业节省一定的费用，但是东莞鵬鲲小编认为这种节省反而会为企业带来致命的经济危机，为啥这样说呢？这不是危言耸听，东莞鵬鲲小编这样说是有原因的，如果你在不换你的订单就会减少喽。为了客户详细介绍靜電噴塗設備的防腐原理有哪些方面？

1.屏蔽原理：金屬表面塗覆塗料經過幹燥（固化）後，把金屬噴粉表面和環境隔開。但是塗層並不能阻止或者減慢腐蝕過程，因爲高聚物有一定的透水性，其結構中的氣孔平均直徑在3～5cm，而水和氧分子的直徑通常只有2～4 cm。爲了提高塗層的抗滲性，塗料應選用透氣性很小的成膜物質和屏蔽性大的固體填料，以使塗層達到一定厚度而均勻、致密無孔。

2. 电化学保护原理：介质渗透涂层接触到金属表面下面就会形成膜下的电化学腐蚀。在涂料中使用活性比较高的金属做填料（比如锌），这样起到牺牲阳极的保护作用，而且锌的腐蚀产物是盐基性的 ZnCl2、ZnCO3等，它填滿了塗層的空隙，使塗膜更加致密，從而使腐蝕大大降低。

3. 缓蚀原理：磷化膜起主要的保护、缓蚀作用。其次，借助涂料的内部组分（如丹红、锌铬黄等具有阻蚀性的颜料）与金属反应，使金属表面钝化或生成保护的物质以提高涂层的保护作用。另外，一些油料在金属皂的催干作用下生成降解产物，也能起到有机缓蚀剂的作用。

靜電噴塗設備

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