热镀锌家电板表面处理已经PCM应用

天物彩板专注高端彩板定制——更多北京热镀锌板厂家_冰箱pcm彩涂板是什么咨询请拨打网站上方电话咨询

热镀锌板广泛应用于家用电器领域，冰箱，电视等。对于不同用途的热镀锌家电，其表面处理工艺也不同。热镀锌电器板主要分为外观部分和功能部分。其中，外观件表面一般采用涂层处理，主要包括喷涂和彩涂；功能件表面一般只进行化学处理，应用最为广泛的是钝化处理。
表面处理工
pcm彩图版表面处理的目的是提高产品在恶劣环境中的使用寿命，获得所需的表面效果或功能。根据表面处理，热镀锌电器板主要分为化学处理钢板和涂层钢板。钢板的化学处理是用铬酸盐或磷酸盐对镀锌钢板表面进行处理，以提高镀锌钢板的耐蚀性、镀层附着力、耐指纹性和润滑性。其中铬酸盐钝化作为一种单独的表面处理工艺被广泛应用。镀膜钢板是指镀锌钢板表面进行镀膜和涂装，主要工艺分为喷涂和彩涂。
钝化处理。如果镀锌板长时间暴露在空气中，由于氧化，板材表面会出现白锈，这会影响外观。因此，表面需要钝化以防生锈。目前，铬酸盐钝化主要用于环境保护钝化、全无铬钝化和抗指纹钝化。其中，环保钝化为普通钝化，钝化膜含有三价铬；全无铬钝化膜根本不含铬，比环保钝化膜更环保，耐腐蚀性更好；耐指纹钝化是专门为解决家用电器板组装过程中因指纹污染而生锈的问题而研制的，钝化膜也完全不含铬，符合高标准的环保要求。此外，新日铁还开发出一种耐腐蚀性强的铬酸盐膜，能够满足加工性能和外观要求，并能在连续生产线上稳定生产。
钝化处理工艺一般为辊涂。其工作原理是在料盘中加入钝化液，取液辊转动时将钝化液浸入料盘中，随辊转动转移到涂辊表面，再将涂辊涂在镀锌板表面。环保钝化一般为正向钝化，无铬钝化和抗指纹钝化一般为反向钝化。前涂层可提供薄的钝化膜，且辊耗低；后涂层可提供厚的钝化膜，但辊耗大。镀锌板经化学钝化处理后

Hot dip galvanized sheet is widely used in the field of home appliances. For different purposes of hot dip galvanized home appliances, the surface treatment process is also different. The hot-dip galvanizing electrical appliance board is mainly divided into appearance parts and function parts. Among them, the surface of appearance parts is generally coated, mainly including spraying and color coating; the surface of function parts is generally only treated by chemical treatment, and the most widely used is passivation treatment.

Surface treatment process
The purpose of surface treatment is to improve the service life of products in harsh environment and to obtain the required surface effect or function. According to the surface treatment, the hot-dip galvanizing electrical appliance board is mainly divided into chemical treatment steel plate and coating steel plate. Chemical treatment of steel plate is to treat the surface of galvanized steel plate with chromate or phosphate, so as to improve the corrosion resistance, coating adhesion, fingerprint resistance and lubrication of galvanized steel plate. Among them, chromate passivation is widely used as a separate surface treatment process. Coated steel plate is the surface of galvanized steel plate to be coated and coated, the main process is divided into spraying and color coating.
Passivation treatment. If the galvanized sheet is exposed to the air for a long time, the surface of the sheet will appear white rust due to oxidation, which will affect the appearance. Therefore, the surface needs to be passivated to prevent rust. At present, chromate passivation is mainly used for passivation, including environmental protection passivation, all chromium free passivation and fingerprint resistant passivation. Among them, the environmental protection passivation is common passivation, and the passivation film contains trivalent chromium; the all chromium free passivation film does not contain chromium at all, which is more environmentally friendly and has better corrosion resistance than the environmental protection passivation film; the fingerprint resistant passivation is specially developed to solve the problem of rusting due to fingerprint contamination in the assembly process of home electric boards, and the passivation film also does not contain chromium at all, which meets the environmental protection requirements of high standards. In addition, Nippon Steel has also developed a chromate film with strong corrosion resistance, which can meet the requirements of processing performance and appearance, and can be stably produced in the continuous production line.

The passivation treatment process is generally roller coating. Its working principle is to add the passivation liquid into the material tray, dip the passivation liquid in the material tray when the liquid taking roller rotates, and transfer it to the surface of the coating roller with the rotation of the roller, and then the coating roller is applied to the surface of the galvanized plate. Environmental protection passivation is generally in the forward direction, while all chromium free passivation and fingerprint resistant passivation are generally in the reverse direction. The forward coating can provide a thin passivation film, and the roll consumption is low; the reverse coating can provide a thick passivation film, but the roll consumption is large. After the chemical passivation treatment, the galvanized sheet ne