Method for post-treatment of electroplated steel sheets for sold

Details Method for post-treatment of electroplated steel sheets for sold Method for post-treatment of electroplated steel sheets for sold

1989-07-13

1991-04-30

Lusignan, Michael

Coating processes

With post-treatment of coating or coating material

Oil or wax treatment of coating

204 351, 204 381, 427404, 427416, 427417, B05D 304, B05D 310

Patent

active

050117114

ABSTRACT:
Electroplated steel sheet suitable for soldering is provided by coating the plated steel sheet with a post-treatment solution in the range of 0.01 to 2 um in dry thickness. The post-treatment solution contains from 2 to 200 g/liter of at least one water-soluble or water-dispersed materials other than phosphoric esters, and/or from 5 to 200 g/liter of phosphoric esters, and also contains from 2 to 100 g/liter of at least one water-soluble or water-dispersable organic fluoro compound. The post-treatment solution may further contain from 0.01 to 3 g/liter of Cr.sup.6+ ion, and/or from 10 to 100 g/liter of organic amine soap. A suitable pH value of the post-treatment solution is between 3 and 10.

REFERENCES:
patent: 4876116 (1989-10-01), Mehan et al.

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