公开(公告)号：US11230782B2

公开(公告)日：2022-01-25

申请号：US15984853

申请日：2018-05-21

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kyung Hwan Lee ,  Young Min Yoo ,  Young Deog Koh ,  Kwang Joo Kim ,  Beom Gon Kim ,  Hyun Seok Shin

IPC: C25D5/36 ,  C25F1/06 ,  C25D11/38 ,  C25D5/50

Abstract: 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.

公开(公告)号：US11655533B2

公开(公告)日：2023-05-23

申请号：US16609178

申请日：2018-04-19

Applicant: Samsung Electronics Co., Ltd

Inventor： Hyun Seok Shin ,  Kwang Joo Kim ,  Young Deog Koh ,  Jin O Kwak ,  Da Hyun Byeoun ,  Young Min Yoo ,  Kyung Hwan Lee ,  Min Kyung Lee

IPC: C23C14/06 ,  B05D5/08 ,  C23C14/02 ,  C23C14/22 ,  C25D11/38 ,  C25F1/04 ,  F24C15/00

CPC classification number: C23C14/0605 ,  B05D5/08 ,  C23C14/021 ,  C23C14/025 ,  C23C14/0611 ,  C23C14/221 ,  C25D11/38 ,  C25F1/04 ,  F24C15/00 ,  Y10T428/30

Abstract: An exterior material of a home appliance having improved corrosion resistance and fingerprint resistance by changing a treatment method of a surface of the exterior material, and the home appliance including the same, and a manufacturing method therefor are provided. The method of manufacturing the exterior material of the home appliance, the method including applying a diamond like carbon (DLC) coating on the substrate to form a DLC coating layer; and conducting anti-fingerprint coating to form the anti-fingerprint coating on the DLC coating layer.