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彩鋼板的生産工藝流程

来源：宝钢彩塗卷 | 發布日期：2022-07-21

彩鋼板是怎麽生産的呢？都是有什麽材質做成的呢？接下來小編就詳細的介紹一下關于彩鋼板的生産工藝流程。

彩钢板生产工艺

1.彩鋼板基材可選用冷軋板或熱鍍層鋼材，采用彩鋼板制作的非鍍層基材，使用壽命短，且刮傷後容易蔓延，導致塗層剝落。彩鋼板的基材主要爲鍍鋅鋼板或鍍鋅合金鋼板。

2.彩色塗層的生産工藝分爲基體預處理、化學轉化膜（非有機金屬塗層）、有機非金屬塗層，此外還有一些生産線的後塗工藝。

3.基材預處理：鍍鋅鋼板作爲基材，如果在生産後不直接進入彩色塗層過程，可能會被腐蝕（白鏽）、灰塵和其他汙染。如果這些不能去除，就會影響彩色塗層的質量和效果。成品的質量以及所有的理化性能都與預處理密切相關。此外，鍍鋅生産後，爲了防鏽和防油，這些油也是在彩色塗層生産前准備的，現在使用更多的預處理方法進行堿液脫脂。

4.化學轉化膜：兩種功能，一是進一步提高防鏽能力，二是提高基材與塗料的附著力，提高基材的塗層性能。一般有三個步驟：一是磷化，先在金屬表面形成大量結晶，再用磷酸鹽溶液在金屬表面形成一層磷酸鹽薄膜；二是鈍化密封，磷酸鹽薄膜仍有一些孔，與鉻酸鹽和孔點發生化學反應形成保護膜。三爲純水沖洗，用脫鹽水或去離子水沖洗去除鈍化液。

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