GB2374085A - Stainless alloys for enhanced corrosion resistance - Google Patents

Stainless alloys for enhanced corrosion resistance Download PDF

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Publication number
GB2374085A
GB2374085A GB0109328A GB0109328A GB2374085A GB 2374085 A GB2374085 A GB 2374085A GB 0109328 A GB0109328 A GB 0109328A GB 0109328 A GB0109328 A GB 0109328A GB 2374085 A GB2374085 A GB 2374085A
Authority
GB
United Kingdom
Prior art keywords
alloy
corrosion resistance
sulfuric acid
range
enhanced corrosion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0109328A
Other versions
GB0109328D0 (en
Inventor
Gordon Cameron
John Rodda
David Hodgson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cecebe Technologies Inc
Original Assignee
Cecebe Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cecebe Technologies Inc filed Critical Cecebe Technologies Inc
Publication of GB0109328D0 publication Critical patent/GB0109328D0/en
Publication of GB2374085A publication Critical patent/GB2374085A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
    • F28F21/083—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys from stainless steel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Heat Treatment Of Steel (AREA)
  • Continuous Casting (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Filtering Materials (AREA)
  • Heat Treatment Of Articles (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

An improved stainless alloy has application in handling concentrated sulfuric acid. The alloy of the invention preferably comprises 23 to 33% chromium, more than 20% nickel, 6% or more of silicon, 0.2% to 0.4% nitrogen and minor amounts of molybdenum, copper, and tungsten with the balance iron. The alloy offers superior corrosion resistance by comparison with the standard stainless steels over the range from 90% sulfuric acid into the oleum range. The alloy is readily weldable and may be used in either cast or wrought form. After heat treating the alloy acquires a duplex structure which has a mixture of austenite and ferrite phases. The heat-treated alloy is ductile.

Description

(12) UK Patent Application fig, GB, , 2 374 085 all, A (43) Date of
Printing by UK Office 09.10.2002 (21) Application No 0109328.5 (51) INTCL7 C22C 38/40 38/02 38/42
(22) Date of Filing 07.10.1999 (52) UK CL (Edition T) (30) Priority Data C7A AA24s AA2sY AA250 AA28X AA28Y AA280 (31) 2249971 (32) 07.10.1998 (33) CA AA30YAA30s AA307 AA309 AA31X AA311 AA313 AA316 AA31s AA320 AA323 AA326 AA329 AA339 (86) International Application Data AA349 AA3sY AA350 AA3s2 AA354 AA389 AA39Y PCT/CA1999/000942 En 07.10.1999 AA394 AA40s AA41Y AA425 AA428 AA43X AA439 AA4ss AA48Y AAsos AA51Y AA529 AA53Y AA543 (87) International Publication Data AA545 AAs47 AA549 AA55Y AA559 AA56X AAs62 W02000/020653 En 13.04.2000 AAs6s AAs68 AAs7Y AA571 AA574 AA577 AA579 AAsss AA60Y AA600 AA60 1 AA603 AA605 AA607 AA6os AA61Y AA613 AA67X AA671 AA673 AA675 (71) Applicant(s) AA677 AA67s AA68X AA681 AA683 AA685 AA686 Cecebe Technologies Inc AA687 AA689 AA69X AA693 AA695 AA697 AA699 llncorporated in Canada) AA70X A750 A7s 4 Wellesbourne Crescent, Willowdale. Toronto, Ontario M2H 1Y7, Canada (56) Documents Cited by ISA JP 070051741 A JP 060093389 A
(72) Inventor(s) JP 050247578A JP020115350A Gordon Cameron US 4793B75 A John Rodda Chemical Abstracts, Vol. 83, No. 10, Abstract No. David Hodgson 83403 & SU 451788T (74) continued overleaf (58) continued overleaf (54} Abstract Ttle Stainless alloys for enhanced corrosion resistance (57) An improved stainless alloy has application in handling concentrated sulfuric acid. The alloy of the invention preferably comprises 23 to 33% chromium, more than 20% nickel, 6% or more of silicon, 0.2% to 0.4% nitrogen and minor amounts of molybdenum, copper, and tungsten with the balance iron. The alloy offers superior corrosion resistance by comparison with the standard stainless steels over the range from 90% sulfuric acid into the oleum range. The alloy is readily weldable and may be used in either cast or wrought form. After heat treating the alloy acquires a duplex structure which has a mixture of austenite and ferrite phases. The heat-treated alloy is ductile.
300- _ _,
25.0 -. _ - - - B Pdm - - - _' -. ' _ 200 E 10) _ _ _.
1, i.
t. . - - _' 100 - '-''2 _! '\ W
so 1 ---- - - ----..
O I,..,.,....... ro 0 10 20 30 40 so 50 70 80 90 100 1 0) Sulphuric Acid ConcentraUon, (wt.%) | o n D
(74) Agent and/or Address for Service (58) Field of Search by ISA
Fitzpatricks INTCL7 C22C 4 West Regent Street, GLASGOW, GZ IRS, United Kingdom
GB0109328A 1998-10-07 1999-10-07 Stainless alloys for enhanced corrosion resistance Withdrawn GB2374085A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA002249971A CA2249971A1 (en) 1998-10-07 1998-10-07 Stainless steel compositions for enhanced corrosion resistance
PCT/CA1999/000942 WO2000020653A1 (en) 1998-10-07 1999-10-07 Stainless alloys for enhanced corrosion resistance

Publications (2)

Publication Number Publication Date
GB0109328D0 GB0109328D0 (en) 2001-05-30
GB2374085A true GB2374085A (en) 2002-10-09

Family

ID=4162899

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0109328A Withdrawn GB2374085A (en) 1998-10-07 1999-10-07 Stainless alloys for enhanced corrosion resistance

Country Status (6)

Country Link
US (1) US20020009382A1 (en)
AU (1) AU6074099A (en)
CA (2) CA2249971A1 (en)
GB (1) GB2374085A (en)
WO (1) WO2000020653A1 (en)
ZA (1) ZA200102807B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113122782B (en) * 2021-04-21 2022-03-15 浙江中煤机械科技有限公司 Stainless steel for pump head body and preparation method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU451788A1 (en) * 1968-04-18 1974-11-30 В. О. Шнирельман Corrosion Resistant Steel
US4793875A (en) * 1987-07-01 1988-12-27 Ingersoll-Rand Company Abrasion resistant casting alloy for corrosive applications
JPH02115350A (en) * 1988-10-25 1990-04-27 Sumitomo Metal Ind Ltd Stainless steel excellent in seawater corrosion resistance
JPH05247578A (en) * 1992-03-05 1993-09-24 Nkk Corp Production of high si stainless steel plate excellent in corrosion resistance
JPH0693389A (en) * 1992-06-23 1994-04-05 Nkk Corp High si stainless steel excellent in corrosion resistance and ductility-toughness and its production
JPH0751741A (en) * 1993-08-18 1995-02-28 Nkk Corp Manufacture of high si-containing stainless steel welded tube having excellent corrosion resistance and ductility

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU451788A1 (en) * 1968-04-18 1974-11-30 В. О. Шнирельман Corrosion Resistant Steel
US4793875A (en) * 1987-07-01 1988-12-27 Ingersoll-Rand Company Abrasion resistant casting alloy for corrosive applications
JPH02115350A (en) * 1988-10-25 1990-04-27 Sumitomo Metal Ind Ltd Stainless steel excellent in seawater corrosion resistance
JPH05247578A (en) * 1992-03-05 1993-09-24 Nkk Corp Production of high si stainless steel plate excellent in corrosion resistance
JPH0693389A (en) * 1992-06-23 1994-04-05 Nkk Corp High si stainless steel excellent in corrosion resistance and ductility-toughness and its production
JPH0751741A (en) * 1993-08-18 1995-02-28 Nkk Corp Manufacture of high si-containing stainless steel welded tube having excellent corrosion resistance and ductility

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, Vol. 83, No. 10, Abstract No. 83403 & SU 451788 A1 *

Also Published As

Publication number Publication date
ZA200102807B (en) 2002-07-23
WO2000020653A1 (en) 2000-04-13
AU6074099A (en) 2000-04-26
CA2249971A1 (en) 2000-04-07
GB0109328D0 (en) 2001-05-30
CA2346087A1 (en) 2000-04-13
US20020009382A1 (en) 2002-01-24

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