Title:
METHOD FOR REMOVING FERRIC IONS FROM SULFATE-BASED IRON ELECTROPLATING SOLUTION
Document Type and Number:
WIPO Patent Application WO/2022/203095
Kind Code:
A1
Abstract:
The present invention relates to a method for effectively removing ferric ions contained in an iron electroplating solution. The method for removing ferric ions contained in a sulfate-based iron electroplating solution comprises a step of regeneration for reduction of the ferric ions by circulating a ferric ion-containing sulfate-based iron electroplating solution in a solution bath containing ferrous metal charged therein, wherein the ferrous metal is charged in an amount that satisfies the following formula (1): S ≥ 0.01 I conv/C max (1).
In formula (1), S indicates a total surface area (㎡) of ferrous metal, C max indicates a maximum permissible ion concentration level (g/L) of the ferric ions in the solution, and I conv indicates, as represented by the following formula (2), converted current (A) obtained by dividing the sum of current (I) applied to an electroplated cell during the plating time (t p, sec) by the regeneration time (t r, sec) for reduction of the ferric ions in an electrolyte.
Inventors:
JUNG JIN-HO (KR)
LEE WON-HWI (KR)
OH KKOCH-NIM (KR)
LIM SANG-BAE (KR)
LEE WON-HWI (KR)
OH KKOCH-NIM (KR)
LIM SANG-BAE (KR)
Application Number:
PCT/KR2021/003533
Publication Date:
September 29, 2022
Filing Date:
March 22, 2021
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C25D21/18; C25D3/20; C25D21/06
Foreign References:
| JPH06306697A | 1994-11-01 | |||
| JPH10102300A | 1998-04-21 | |||
| JPH09165698A | 1997-06-24 | |||
| CN210163184U | 2020-03-20 | |||
| KR0138617B1 | 1998-07-15 | |||
| KR20110137463A | 2011-12-23 | |||
| KR20150185858A | ||||
| JPH06181533A | 1994-06-28 | |||
| JPS63259089A | 1988-10-26 |
Other References:
See also references of EP 4317537A1
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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