我司是专业从事于金属磷化加工的高科技企业。
现有全自动磷化加工线4条，在职员工200人，主要从事锰系磷化加工，锌系磷化加工，黑色锰系磷化加工，锌系涂装磷化加工。
产品磷化膜外观均匀一致。具有很高的防腐性能，锰系磷化盐雾时间48-96小时.
公司已通过了ISO9001-2000，TS16949质量体系，美国AQA认证。
化学方法除锈的一些知识要点
提高除锈剂的质量和添加液的合理配合，可以显著提升除锈性能，太高除锈液的使用时间。
钢件在除锈前要进行除油这一步，需要热水烫，使氧化皮松动，便于除锈剂浸入到氧化皮里面。
还可以利用钢件的温度提升除锈剂的温度使除锈效果更好，加快除锈速度。
严禁除锈时间太长，如果除锈时间太长基体腐蚀严重使表面粗糙，尺寸也会有变化。
容易使钢件泛黄甚至影响磷化膜质量，但是除锈时间太短钢件基材表面活化性能不够，同样也会影响到磷化膜效果。
所以只有控制好除锈时间才能获得良好的磷化膜，为磷化提供更好的基体。
钢件除锈后发黄的程度和钢件表面的清洁程度有关，也就是说和钢件表层的酸碱度有关，钢件处在酸性状态下比在中性碱性状态下更可能发黄。
特别要注意的是管道件盲孔件后的水系质量，在没有喷淋的条件下，难以洗净残酸和残渣只能采用两道水洗，才能彻底清除夹缝和空隙内的残留液和杂质。
滚筒酸洗有利于除去钢件表面氢气，改变滚筒内外酸液的更换。
而工件需要酸洗时，应在线外进行酸洗。通过碱性除油和腐蚀的钢件，表面可能会有一层黑灰。
为了获得光亮的钢件表面，必须要用酸性溶剂酸洗处理。
为了消除酸洗在钢件上的残留，对后续工序有影响，但是对于一些焊接件有不能有碱性中和。
因为会生成难溶于水的氢氧化铁，这些物质会吸附的钢件表面影响到磷化反应的进行，使磷化不完整对涂层有很大的危害。
就算是需要中和，也只能用少量的碳酸钠，因为碱性浓度太大碱液不好清洗彻底。
上海磷化处理工件表面有碱性的液体，对后续的表面效果减弱外，还会干扰磷化反应的有序进行。
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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