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噴塑加工過程中出現針孔的主要原因

日期:2019-05-17 16:40 人氣:
    噴塑加工的過程包括:前處理、靜電噴涂、高溫固化、裝飾處理。前處理步驟包括除油、除銹、磷化、鈍化。其加工過程復雜難控,所以噴塑工件固化后常出現針孔,其的主要原因有:
1. 板面銹蝕;
2. 鍍鋅底材含氫離子;
3. 磷化前處理后發黃;
4. 工件磷化后,水洗不干凈,尤其在工件四周表現為圈狀針孔;
5. 陰陽離子交換樹脂脫鹽水呈酸性;
6. 粉末質量。 
    濟南天盟新材料科技有限公司通過對大量的施工經驗總結和不斷的涂層創新研發,根據這些出現針孔的原因,我們也討論并制定了一系列解決方法來應對:
1. 磷化后及時烘干,立即噴涂;
2. 脫氫處理(200℃左右,2h);
3. 調整磷化液參數,注意游離酸濃度不宜過高;
4. 換成新鮮水,清洗噴嘴,使水壓>1.5bar;
5. 停用,暫以自來水代替,化驗pH值,要求達到6~7;
6. 取新鮮樣粉,按標準條件固化以檢驗粉末質量。
    公司對外承接大型噴塑業務,歡迎廣大客戶來電咨詢:400-0708-056
    本文由濟南天盟新材料科技有限公司http://www.xiaoluo6.com整理發布
噴塑加工過程中出現針孔的主要原因

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