Passivation surface treatment of stainless steel

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United States of America

PATENT NO 11230782
APP PUB NO 20190203371A1
SERIAL NO

15984853

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Abstract

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A passivation surface treatment method of stainless steel that improves corrosion resistance including in a brine environment without changing the appearance of the surface of stainless steel. A passivation surface treatment method for stainless steel includes: performing degreasing of stainless steel, performing electrolytic pickling where the stainless steel that underwent the degreasing is immersed in a pickling solution having phosphoric acid (H3PO4) and is connected to the anode and a voltage of about 0.5 to 5.0 V for about 10 seconds or more is applied, performing electrolytic degreasing of the stainless steel, and performing electrolytic passivation where the stainless steel that underwent the electrolytic degreasing is immersed in a passivation solution including dichromic acid and chromium sulfate and a voltage of about 0.5 to 5.0 V is applied for 5 seconds or more.

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Patent Owner(s)

Patent OwnerAddress
SAMSUNG ELECTRONICS CO LTDGYEONGGI DO SOUTH KOREA GYEONGGI-DO

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kim, Beom Gon Yongin-si, KR 10 174
Kim, Kwang Joo Seoul, KR 9 23
Koh, Young Deog Seongnam-si, KR 11 10
Lee, Kyung Hwan Suwon-si, KR 41 173
Shin, Hyun Seok Suwon-si, KR 6 50
Yoo, Young Min Seoul, KR 11 19

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