EP0045207A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Protecting steel during heat treatment
Assignee: MOLDLINE Ltd
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Filing: 1981-07-27
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Granted: —
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Expires: 2001-07-27
Abstract
Abstract In order to reduce loss from a steel article due to scaling when it is subjected to a treatment involving heating, for example annealing or hot rolling, a coating composition is applied to the article to form thereon a coating comprising finely divided iron oxide particles. Preferred coating compositions include red mud which is a residue left after the extraction of alumina from bauxite, and flue dust from an iron- or steel-melting furnace.
Inventors
- 👤 John Johnson Chappell
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 09:17
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/68; B; B23; B23K; B23K35/00; B23K35/22; B23K35/224; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
41 words
A method of protecting a steel article during treatment involving heating of the steel cbaracterised in that prior to such heat treatment a coating composition is applied to said article to form thereon a coating comprising finely divided iron oxide particles.
Claim 2
Independent Claim
41 words
A method of protecting a steel article during treatment involving heating of the steel cbaracterised in that prior to such heat treatment a coating composition is applied to said article to form thereon a coating comprising finely divided iron oxide particles.
Claim 3
Dependent Claim
17 words
A method according to claim 1, wherein substantially the whole surface of the article is so coated.
Claim 4
Dependent Claim
19 words
A method according to claim 1 or 2, wherein such coating composition comprises finely divided solids in a binder.
Claim 5
Dependent Claim
21 words
A method according to claim 3 wherein said iron oxide particles amount to at least 30% by weight of said solids.
Claim 6
Independent Claim
13 words
A method according to claims 3 or 4, wherein said binder is aqueous.
Claim 7
Independent Claim
24 words
A method according to any preceding claim, wherein said iron oxide particles are of a size to pass a 300 British Standard mesh screen.
Claim 8
Independent Claim
17 words
A method according to any preceding claim, wherein such coating composition comprises red mud as herein defined.
Claim 9
Independent Claim
20 words
A method according to any preceding claim, wherein such coating composition comprises flue dust from an iron- or steel-melting furnace.
Claim 10
Independent Claim
19 words
A method according to any preceding claim, wherein such coating composition comprises at least one finely divided iron ore.
Claim 11
Dependent Claim
11 words
A method according to claim 1 and substantially as herein described.
References Cited (Backward Citations)
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