	US 12,221,702 B2
	Surface treatment solution composition containing trivalent chromium and inorganic compound, and method for manufacturing hot dip galvanized steel sheet surface-treated using same
Soo-Hyoun Cho, Pohang-si (KR); and Kang-Min Lee, Gwangyang-si (KR)
Assigned to POSCO CO., LTD, Pohang-si (KR)
Appl. No. 17/288,232
Filed by POSCO, Pohang-si (KR)
PCT Filed Oct. 17, 2019, PCT No. PCT/KR2019/013646 § 371(c)(1), (2) Date Apr. 23, 2021, PCT Pub. No. WO2020/085716, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 10-2018-0127781 (KR), filed on Oct. 24, 2018.
Prior Publication US 2021/0388504 A1, Dec. 16, 2021
Int. Cl. C23C 22/08 (2006.01); B05D 1/18 (2006.01); B05D 3/00 (2006.01); B05D 3/02 (2006.01); B32B 15/01 (2006.01); B32B 15/04 (2006.01); B32B 15/08 (2006.01); B32B 15/18 (2006.01); C09D 5/08 (2006.01); C09D 7/61 (2018.01); C09D 183/04 (2006.01); C23C 2/06 (2006.01); C23C 2/26 (2006.01); C23C 2/40 (2006.01); C23C 22/05 (2006.01); C23C 22/26 (2006.01); C23C 22/28 (2006.01); C23C 22/30 (2006.01); C23C 22/42 (2006.01); C23C 22/53 (2006.01); C23C 22/56 (2006.01); C23C 22/82 (2006.01); C23C 28/00 (2006.01); C08K 3/28 (2006.01); C08K 3/32 (2006.01); C08K 3/36 (2006.01); C08K 5/07 (2006.01); C08K 13/02 (2006.01); C23C 22/40 (2006.01)

CPC C23C 22/08 (2013.01) [B05D 1/18 (2013.01); B05D 1/185 (2013.01); B05D 3/007 (2013.01); B05D 3/02 (2013.01); B05D 3/0209 (2013.01); B05D 3/0254 (2013.01); B05D 3/0272 (2013.01); B05D 3/0281 (2013.01); B32B 15/012 (2013.01); B32B 15/013 (2013.01); B32B 15/04 (2013.01); B32B 15/08 (2013.01); B32B 15/18 (2013.01); C09D 5/084 (2013.01); C09D 5/086 (2013.01); C09D 7/61 (2018.01); C09D 183/04 (2013.01); C23C 2/06 (2013.01); C23C 2/26 (2013.01); C23C 2/40 (2013.01); C23C 22/05 (2013.01); C23C 22/26 (2013.01); C23C 22/28 (2013.01); C23C 22/30 (2013.01); C23C 22/42 (2013.01); C23C 22/53 (2013.01); C23C 22/56 (2013.01); C23C 22/82 (2013.01); C23C 28/00 (2013.01); C23C 28/3225 (2013.01); C23C 28/34 (2013.01); C23C 28/345 (2013.01); B05D 2202/10 (2013.01); C08K 3/28 (2013.01); C08K 2003/328 (2013.01); C08K 3/36 (2013.01); C08K 5/07 (2013.01); C08K 13/02 (2013.01); C08K 2201/014 (2013.01); C23C 22/40 (2013.01); C23C 2222/10 (2013.01); C23C 2222/20 (2013.01); Y10T 428/12556 (2015.01); Y10T 428/12569 (2015.01); Y10T 428/12757 (2015.01); Y10T 428/12799 (2015.01); Y10T 428/2495 (2015.01); Y10T 428/24967 (2015.01); Y10T 428/263 (2015.01); Y10T 428/264 (2015.01); Y10T 428/265 (2015.01)]

15 Claims

1. A surface treatment solution composition comprising:

based on 100 wt % of a total solid content of the surface treatment solution composition,

37.7 to 58.1 wt % of a trivalent chromium compound comprising chromium phosphate and chromium nitrate, wherein a weight ratio of the chromium phosphate in a total weight of the chromium phosphate and the chromium nitrate is 0.89 to 0.95;

34.6 to 40.7 wt % of a silane coupling agent;

1.4 to 8.2 wt % of a vanadium-based anti-corrosive rust inhibitor;

4.2 to 6.6 wt % of colloidal silica; and

1.7 to 6.8 wt % of a polysiloxane copolymer.