Invention Grant
- Patent Title: Steel for resistance to complex corrosion from hydrochloric acid and sulfuric acid, having excellent wear resistance and surface qualities
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Application No.: US14917926Application Date: 2013-11-25
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Publication No.: US10196704B2Publication Date: 2019-02-05
- Inventor: Jeong-Bong Yoon , Byoung-Ho Lee , Jong-Hwa Kim
- Applicant: POSCO
- Applicant Address: KR Pohang-si, Gyeongsangbuk-do
- Assignee: POSCO
- Current Assignee: POSCO
- Current Assignee Address: KR Pohang-si, Gyeongsangbuk-do
- Agency: McDermott Will & Emery LLP
- Priority: KR10-2013-0108704 20130910
- International Application: PCT/KR2013/010725 WO 20131125
- International Announcement: WO2015/037783 WO 20150319
- Main IPC: C22C38/02
- IPC: C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/16 ; C22C38/60 ; C22C38/08 ; C21D9/46 ; C21D8/02 ; C22C38/00 ; C21D1/84 ; C21D6/00 ; C22C38/10

Abstract:
There are provided a steel sheet for resistance to composite corrosion from sulfuric acid and hydrochloric acid, having excellent wear resistance and surface quality, and a method of manufacturing the same. The steel sheet having excellent surface qualities may be provided by improving resistance to erosion occurring due to coal cinders to increase a lifespan thereof and securing excellent resistance to composite corrosion from sulfuric acid and hydrochloric acid. Wear resistance may be significantly increased by adding P, and in order to solve a problem in that wear resistance is deteriorated due to the addition of P, a component system and a hot rolling process condition may be controlled, thereby forming a corrosion resistant layer having excellent corrosion resistance.
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