我司是專業(yè)從事于金屬磷化加工的高科技企業(yè)。
現(xiàn)有全自動磷化加工線4條，在職員工200人，主要從事錳系磷化加工，鋅系磷化加工，黑色錳系磷化加工，鋅系涂裝磷化加工。
產(chǎn)品磷化膜外觀均勻一致。具有很高的防腐性能，錳系磷化鹽霧時間48-96小時.
公司已通過了ISO9001-2000，TS16949質(zhì)量體系，美國AQA認(rèn)證。
化學(xué)方法除銹的一些知識要點
提高除銹劑的質(zhì)量和添加液的合理配合，可以顯著提升除銹性能，太高除銹液的使用時間。
鋼件在除銹前要進(jìn)行除油這一步，需要熱水燙，使氧化皮松動，便于除銹劑浸入到氧化皮里面。
還可以利用鋼件的溫度提升除銹劑的溫度使除銹效果更好，加快除銹速度。
嚴(yán)禁除銹時間太長，如果除銹時間太長基體腐蝕嚴(yán)重使表面粗糙，尺寸也會有變化。
容易使鋼件泛黃甚至影響磷化膜質(zhì)量，但是除銹時間太短鋼件基材表面活化性能不夠，同樣也會影響到磷化膜效果。
所以只有控制好除銹時間才能獲得良好的磷化膜，為磷化提供更好的基體。
鋼件除銹后發(fā)黃的程度和鋼件表面的清潔程度有關(guān)，也就是說和鋼件表層的酸堿度有關(guān)，鋼件處在酸性狀態(tài)下比在中性堿性狀態(tài)下更可能發(fā)黃。
特別要注意的是管道件盲孔件后的水系質(zhì)量，在沒有噴淋的條件下，難以洗凈殘酸和殘渣只能采用兩道水洗，才能徹底清除夾縫和空隙內(nèi)的殘留液和雜質(zhì)。
滾筒酸洗有利于除去鋼件表面氫氣，改變滾筒內(nèi)外酸液的更換。
而工件需要酸洗時，應(yīng)在線外進(jìn)行酸洗。通過堿性除油和腐蝕的鋼件，表面可能會有一層黑灰。
為了獲得光亮的鋼件表面，必須要用酸性溶劑酸洗處理。
為了消除酸洗在鋼件上的殘留，對后續(xù)工序有影響，但是對于一些焊接件有不能有堿性中和。
因為會生成難溶于水的氫氧化鐵，這些物質(zhì)會吸附的鋼件表面影響到磷化反應(yīng)的進(jìn)行，使磷化不完整對涂層有很大的危害。
就算是需要中和，也只能用少量的碳酸鈉，因為堿性濃度太大堿液不好清洗徹底。
上海磷化處理工件表面有堿性的液體，對后續(xù)的表面效果減弱外，還會干擾磷化反應(yīng)的有序進(jìn)行。
Still can use steel parts temperature ascend rust remover temperature make rust removal effect is better, to speed up the rust removal rate. It is strictly prohibited to rust removal time is too long, if rust removal time too long matrix corrosion serious make rough surface, size will also change. Easy to make steel parts yellowing and even influence the quality of phosphating film, but rust removal time too short steel a substrate surface activation performance is not enough, will also affect the phosphate coating effect. So only control good rust removal time to obtain good phosphating film, for phosphating provide better matrix. Steel parts after cleaning yellow and degree of steel pieces of the surface cleaning degree about, that is to say and steel parts surface of ph related, steel parts in acidic condition than in neutral alkaline condition is more likely to yellowing. Special attention should be paid to the pipeline is a blank piece of drainage quality, in the absence of spray conditions, difficult to wash residual acid and residue can only use two water washing, can thoroughly clean the crack and space within the residual liquid and impurities. Drum pickling is helpful to remove steel parts surface hydrogen, change the cylinder inside and outside acid replacement. And the workpiece need pickling, should the online for pickling. Through the basic oil removing and corrosion of steel parts, surface may have a layer of black ash. In order to get light steel parts surface, must use acid solvent pickling treatment. In order to eliminate pickling in steel pieces of the residue, the subsequent handling have effect, but for some weldments have not alkaline neutralization. Because will generate insoluble in water of ferric hydroxide, these substances will adsorption of steel parts surface affect the phosphate reaction, make phosphating incomplete on the coating has great harm. Even need neutralization, also can only use a small amount of sodium carbonate, because the alkaline concentration is too big bad alkali cleaning thoroughly. The workpiece surface is alkaline liquid, on the surface of the follow-up effect weakened outside, still can interfere with phosphate reaction of the orderly. |
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