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鑄件表面處理的種類有哪些

發布時間:2018-04-02點擊量:49

表面處理的種類很多,最常見的有:電鍍、油漆、噴塑、熱浸、真空鍍、熱噴、“達克羅”、機械鍍、氧化和鈍化等。

所有的表面處理工藝,各有優缺點,效果好壞要根據用途決定,如為了防銹都用鍍鋅,再進一步說,如用在室內一般選電鍍鋅,而在室外就選熱浸鋅或熱噴鋅好,要求更高的還要再進行涂漆。而為了裝飾,用鍍鋅就不好。所以只有決定了使用場合、目的等,才能選擇最好的表面處理工藝。鍍鋅和噴銀塑相比,如用在裝飾性上,用噴銀飾比鍍鋅好;如果是緊固件等使用時要有尺寸控制,還要摩擦,選噴銀塑就不能用。

噴銀塑外觀均勻,色澤一致,色彩持久不變,常用在儀器儀表的外殼防護和裝飾;鍍鋅外觀易變暗,裝飾性遠不如噴銀塑好。

There are many kinds of surface treatment, the most common are: plating, paint, spray, hot dip, vacuum plating, thermal spraying, "Dacromet", mechanical plating, oxidation and passivation.

All the surface treatment processes have their own advantages and disadvantages. The effect is decided according to the purpose. For example, galvanizing is used for rust prevention. Further, if it is used indoors, electroplating of zinc is generally selected, while outdoor selection of hot dip galvanizing or Hot spray zinc is better, and the paint is required to be higher. For decoration, galvanization is not good. Therefore, the best surface treatment process can be selected only when the use occasion and purpose are determined. Compared with sprayed silver plastic, galvanized and sprayed silver plastic is better than silver plating if it is used for decorative purposes; if it is a fastener, etc., it must be used for dimensional control and friction, and silver spray plastic cannot be used.

Jet silver plastic uniform appearance, uniform color, color lasting, commonly used in instrumentation shell protection and decoration; galvanized appearance is easy to darken, decorative far better than spray silver plastic.


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