Method for removing rust from a rusted steel

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(11)

EP 2 725 121 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	05.10.2016 Bulletin 2016/40

(43)	Date of publication A2:
	30.04.2014 Bulletin 2014/18

(21)	Application number: 13005062.8

(22)	Date of filing: 23.10.2013

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International Patent Classification (IPC):

C25F 1/06^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

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Priority:

24.10.2012 TW 101139293
24.10.2012 TW 101139291

(71)	Applicant: Zen Material Technologies, Inc.
	81170 Kaohsiung City (TW)

(72)	Inventors:
	Cheng, I-Lin 806 Kaohsiung City (TW) BAI, Allen 408 Taichung City (TW) LAI, Cheng-Lung 82050 Kaohsiung City (TW) HO, Ka-King 70145 Tainan City (TW) Tseng, Wan-Ning 82241 Kaohsiung City (TW) PAI, Chia-Hsiang 80794 Kaohsiung City (TW) LI, Ai-Kang 31055 Zhudong Township, Hsinchu County (TW) LEE, Shih-Wen 40677 Taichung City (TW) HSU, Wen-Ting 11487 Taipei City (TW)

(74)	Representative: Zeitler Volpert Kandlbinder Patent- und Rechtsanwälte Partnerschaft mbB
	Herrnstrasse 44 80539 München 80539 München (DE)

(54)	Method for removing rust from a rusted steel

(57) A method for removing rust from a rusted steel includes: (a) subjecting the rusted steel to an electrolytic treatment in an electrolytic bath of an alkaline electrolyte solution that contains tartrate, the tartrate in the alkaline electrolyte solution having a molar concentration equal to or greater than 0.4M,the rusted steel serving as an anode in the electrolytic bath, the electrolytic treatment being conducted by applying a current with a current density equal to or greater than 10 A/dm² across the electrolytic bath; and (b) applying a mechanical force to the rusted steel after step (a) so as to remove rust from the rusted steel.

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