藍色彩涂板0.5*1250 ppgi彩涂卷鍍鋅鋼板定尺開平彩鋼

彩涂卷材料共分爲五類：包裝類、家電類、建材類、光學材料及裝飾材料。其中以家電類彩涂卷工藝最好最精細，消費要求最高。

Color coating and roll materials are divided into five categories: packaging, home appliances, building materials, optical materials and decorative materials. Among them, the home appliance color painting process is the best and the most fine, with the highest consumption requirements.

彩涂卷預處理工藝

1、在進行彩涂卷線設計時,首先要考慮的三個基本要素為:質(zhì)量、產(chǎn)品的多樣化、高產(chǎn)，隨著彩涂卷需求量的增加,對這三個要素的要求更加嚴格。影響涂層機組生產(chǎn)的因素很多,如帶鋼預處理、涂機和固化爐等,但最關鍵的兩個因素是涂機和固化爐。預處理工藝的主要目的是除去帶鋼表面的油脂和雜質(zhì),并通過鈍化,在鋼板表面形成一層化學轉化膜,以提高涂層與帶鋼基板間的附著力和帶鋼耐腐蝕能力。預處理工藝為:脫脂※刷洗※熱水沖洗※表面調(diào)整※熱水沖洗※鈍化※烘干。

2、表面調(diào)整是生產(chǎn)某些產(chǎn)品時在磷酸鹽或鉻酸鹽處理之前增加的一種表面處理工藝。使用含Ni、F離子的弱酸性藥劑對帶鋼表面進行噴淋處理,其目的是提高涂層性能和涂敷型鈍化劑的附著能力,并去除鍍鋅基板表面晶粒邊界處析出的Al、Pb等物質(zhì),這種工藝尤其以日本的為代表。鈍化通常需使用磷酸鹽或鉻酸鹽對基板進行處理,鈍化方法主要有噴淋型、浸入型和涂敷型。隨著用戶對涂膜均勻性要求越來越高和人們對環(huán)境保護的日益重視,涂敷型鈍化方法倍受關注。涂敷型鈍化采用輥涂法將處理液涂敷到帶鋼表面,形成金屬與涂層之間的隔離膜。采用這種方法,鈍化過程容易控制且膜厚均勻,同時廢液很少或幾乎沒有,有利于環(huán)境保護。

3、在預處理工藝布置上有兩種設計,一種是在入口活套前設預清洗段,活套后設預處理段,這種設計被歐洲的一些彩涂線供應商普遍采用,如法塔·亨特公司;另一種設計是只在活套后設預處理段,活套前不設預清洗段,這種設計為亞州的彩涂線供應商所采用,如新日鐵公司和浦項公司。第一種設計優(yōu)點是當原料表面質(zhì)量不好時,設置在入口活套前的預脫脂處理段可將來料表面的大顆粒雜質(zhì)處理掉,避免將大顆粒雜質(zhì)帶入活套,粘在活套的輥上,對后面的來料表面質(zhì)量產(chǎn)生影響,缺點是消耗大、成本高;第二種設計是考慮完全能在預處理段將帶鋼表面處理干凈,無需在活套前設預清洗段,增加運行成本。

Color coating preprocessing process

1. In the design of color coating rolling line, the first three basic elements should be considered are: quality, product diversification and high yield. With the increase of the demand for color coating rolling, the requirements for these three elements are more strict. There are many factors affecting the production of coating units, such as strip pretreatment, coating machine and curing furnace, but the two most critical factors are coating machine and curing furnace. The main purpose of the pretreatment process is to remove the grease and impurities on the surface of the strip steel, and to form a chemical conversion film on the surface of the steel plate through passivation to improve the adhesion between the coating and the strip substrate and the corrosion resistance of the strip steel. The pretreatment process is: defatasing scrub hot water washing surface adjust hot water flushing passivation drying.

2. Surface adjustment is a surface treatment process added in the production of some products before the phosphate or chromate treatment. The weak acid agent containing Ni and F ions is used to spray the strip surface, the purpose is to improve the coating performance and the attachment ability of the coated passivation agent, and remove Al, Pb and other substances precipitated at the grain boundary on the surface of the galvanized substrate. This process is especially represented by Japan. Passivation usually requires the use of phosphate or chromate to treat the substrate, and the passivation methods mainly include spray type, immersion type and coating type. With users 'increasing requirements for coating uniformity and people's increasing attention to environmental protection, coating type passivation methods have attracted much attention. The coating passivation applies the treatment solution to the surface of the strip steel to form a separation film between metal and coating. Using this method, the passivation process is easy to control and the film thickness is uniform, with little or no waste liquid, which is conducive to environmental protection.

3. There are two designs in the pretreatment process layout, one is pre-cleaning section before the entrance cover and pretreatment section after the cover. This design is widely adopted by some paint line suppliers in Europe, such as Fatah Hunter Company; the other design is only pre-cleaning section after the cover, which is adopted by paint line suppliers in Asia, such as Nippon Railway Company and POSCO Company. The advantage of the first design is that when the surface quality of the raw material is bad, the pre-skim treatment section set before the inlet sleeve can dispose of the large particle impurities into the surface and the influence on the surface quality of the incoming material with the high consumption and high cost; the second design is to increase the operation cost.