日本h番全彩无遮挡h工口-国产精品无码无片在线观看3d-四虎国产成人永久精品免费-广东少妇大战黑人34厘米视频-人人妻人人狠人人爽天天综合网

當前位置:首頁-新聞資訊

鋁卷成卷前的處理工作

來源:http://www.kangyanghua.com/ 發布時間:2021-07-29

鋁卷在成卷之前,需要做一些預處理工段,以保證鋁卷表面的清潔。以免其表面存在殘留的油脂及潤滑劑,對涂裝及使用產生影響。所以,鋁卷在成型前要對它進行以下幾個方面的額預處理。
Before the aluminum coil is rolled, some pretreatment sections need to be done to ensure the cleanness of the surface of the aluminum coil. To avoid residual grease and lubricant on the surface, which will affect the coating and use. Therefore, the aluminum coil should be pretreated in the following aspects before forming.
一,可以使用熱水對鋁卷進行清洗。熱水清洗主要是將基板表面殘留的脫脂劑清洗干凈,保證這些殘留物能溶解其中,以防這些脫脂劑對基板造成二次污染。使用方式多為浸洗和噴淋刷洗的方式。所用水質硬度不要太高,否則,水中的礦物質會在基板表面生成礦斑。
1、 Hot water can be used to clean the aluminum coil. Hot water cleaning is mainly to clean the residual degreasing agent on the surface of the substrate to ensure that these residues can be dissolved, so as to prevent these degreasing agents from causing secondary pollution to the substrate. The use methods are mostly immersion washing and spray brushing. The hardness of the water used should not be too high, otherwise the minerals in the water will form mineral spots on the surface of the substrate.


二,熱堿脫脂由于預涂線線速較快,所以所用的脫脂劑一般濃度較高,典型的脫脂劑含有氫氧化鈉(NaOH)、碳酸鈉(Na2Co3)、水玻璃(Na2SiO3)、磷酸鹽等組份。熱堿脫脂工序一般分兩步處理以確保鋁卷基板表面清洗干凈,且多用噴淋刷洗的方式。
2、 Due to the fast line speed of precoating, the degreaser used for hot alkali degreasing generally has a high concentration. The typical degreaser contains sodium hydroxide (NaOH), sodium carbonate (Na2CO3), sodium silicate (Na2SiO3), phosphate and other components. The hot alkali degreasing process is generally divided into two steps to ensure that the surface of aluminum coil substrate is cleaned, and spray brushing is often used.
三,對它進行鈍化處理。鈍化處理是通過加壓噴淋、浸涂或輥涂等方式使鈍化劑在基材表面形成轉化膜。一般使用加壓噴淋的方式,鈍化液在使用過程中產生的泥渣往往會堵塞噴孔,從而影響噴淋得效果。
3、 Passivate it. Passivation treatment is to form a conversion film on the surface of the substrate by means of pressurized spraying, dip coating or roll coating. Generally, pressurized spraying is used. The sludge generated during the use of passivation liquid often blocks the spray hole, thus affecting the spraying effect.
浸涂的方式雖然解決了這一問題,但鈍化液的消耗量較大。以上兩種方法在實際操作中都需要用水沖洗多余的鈍化液,就會產生廢水的回收和凈化問題,輥涂是鈍化施工方式,具有涂布均勻、經濟實用、不需淋洗等優點。鋁板一般采用鉻酸鹽/氧化物型處理劑,該類處理劑含有鉻酸鹽、鉻酸、磷酸及促進劑氟化物和鉬酸鹽。該類處理劑必須加入磷酸,否則就不能用來處理食品和飲料用鋁板。
Although dip coating solves this problem, the consumption of passivation solution is large. In practice, the above two methods need to wash the excess passivation solution with water, which will produce the problem of wastewater recovery and purification. Roll coating is a passivation construction method, which has the advantages of uniform coating, economy and practicality, no leaching and so on. Chromate / oxide treatment agent is generally used for aluminum plate, which contains chromate, chromic acid, phosphoric acid and accelerator fluoride and molybdate. This kind of treatment agent must be added with phosphoric acid, otherwise it can not be used to treat aluminum plates for food and beverage.

主站蜘蛛池模板: 日韩亚洲欧美中文高清在线| 免费午夜爽爽爽www视频十八禁 | 丰满多毛的大隂户视频| 黑人处破女免费播放| 日韩日韩日韩日韩日韩日韩 | 久久精品国产亚洲av日韩| 亚洲综合一区二区三区无码| 美女裸体十八禁免费网站| 成人免费无遮挡无码黄漫视频 | 日本高清视频www| 国产波霸爆乳一区二区| 中文字幕丰满乱子伦无码专区| 精品一区二区三区在线播放视频 | 亚洲avav天堂av在线网爱情 | 亚洲欧美精品午睡沙发| 激情 小说 亚洲 图片 伦| 亚洲色偷偷偷综合网| 亚洲av无码国产精品夜色午夜| 亚洲av蜜桃永久无码精品| 免费看无码特级毛片| 欧美激情综合色综合啪啪五月| 三年片大全免费观看| 国产精品户露av在线户外直播| 久久久精品国产免大香伊| 1000部夫妻午夜免费| 无码一区二区三区老色鬼| 国产白浆喷水在线视频| 日本大片在线看黄a∨免费| 一出一进一爽一粗一大视频免费的| 大色综合色综合网站| 亚洲熟女一区二区三区| 日韩精品一区二区亚洲av| h无码精品3d动漫在线观看| 亚洲日本va中文字幕久久| 伊人天堂av无码av日韩av| 2020无码专区人妻系列日韩| 久久亚洲av无码精品色午夜麻豆| 中文无码精品a∨在线| 久久av无码αv高潮αv喷吹| 永久免费av网站| 日本爽爽爽爽爽爽在线观看免|