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Causes and solutions of problems frequently occurred in phosphating process

- Aug 16, 2018 -

Causes and solutions of problems frequently occurred in phosphating process

1)Yellow

 1, which can be erased by hand, yellow rust, non-rust removal

 2, nail scratch, scratch, is yellow film 1, less promotion dose

 2), tank temperature is too low, 

 3), low total acidity

 4), table adjustment did not replace in time 

5), after phosphorization of the workpiece extrusion placement, not dry 

6), tank fluid is not uniform 

2, white hanging ash1. Incomplete washing with residual phosphate2. Too much phosphating liquid sediment

 3, too much accelerant content

4. Unevenness of tank liquid: flower film

 1, workpiece over-corrosion, serious situation;

 2, incomplete oil removal;

 3, low total acidity;

 4 tank fluid unevenness