珠海市劲威科技有限公司

MST-7铁系磷化剂

  • 产品详情

产品简介
  本品为常温高效铁系磷化成膜剂。特点是沉渣少甚至几乎无渣;磷化后在金属表面形成一层均匀致密的蓝彩   金黄色的保护膜;膜与涂层的附着力好,耐蚀性强,特别是涂装后,与涂层的柔韧性极佳。适用于黑色金属表面涂装前处理。 


物化指标
                


使用指南:
  1.工艺流程:除油-水洗-除锈-水洗-磷化-水洗-干燥
  2.使用方法:
                        


 3.槽液管理:
   a.MST-7添加每次以1~1.5%为宜,一般情况下每添加1%原液,游离酸上升0.2点左右,总酸上升1.5点左右。
   b.当槽液比重少于1.02g/cm3和PH值大于3.5时,需补加MST-7;PH值小于2时,应用3~5%的纯碱溶液进行中和,控制PH值在2.5~3.0为宜。
   c.游离酸的侧定:用移液管取10ml工作液注入250ml锥形瓶中,加蒸馏水50ml,滴加3~5滴溴酚兰指示剂,用0.1NNaoH标准溶液滴定,滴定至由黄绿色变成浅兰紫色为终点,所耗用0.1NNaoH标准溶液的毫升数即为游离酸的点数。
   d.总酸的测定:用移液管取10ml工作液注入250ml的锥形瓶中,加蒸馏水50ml,再加3~5滴酚酞指示剂,摇匀,然后用0.1NNaoH标准溶液滴至稳定的淡红色(静置30秒红色不消失)为终点,所耗用的标准溶液的毫升数即为总酸点数。

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