US3923557A - Corrosion resistant aluminum alloys - Google Patents

Corrosion resistant aluminum alloys Download PDF

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Publication number
US3923557A
US3923557A US451074A US45107474A US3923557A US 3923557 A US3923557 A US 3923557A US 451074 A US451074 A US 451074A US 45107474 A US45107474 A US 45107474A US 3923557 A US3923557 A US 3923557A
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US
United States
Prior art keywords
silicon
alloy
manganese
corrosion
aluminum
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.)
Expired - Lifetime
Application number
US451074A
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English (en)
Inventor
William H Anthony
Popplewell
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.)
Rio Tinto Switzerland AG
Original Assignee
Alusuisse Holdings AG
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
Priority claimed from US414862A external-priority patent/US3878871A/en
Application filed by Alusuisse Holdings AG filed Critical Alusuisse Holdings AG
Priority to US451074A priority Critical patent/US3923557A/en
Priority to CA209,329A priority patent/CA1028175A/en
Priority to CH1483974A priority patent/CH611934A5/xx
Priority to NO74744053A priority patent/NO136677C/no
Priority to JP49129822A priority patent/JPS50112209A/ja
Priority to SE7414121A priority patent/SE421326B/xx
Priority to DE19742453668 priority patent/DE2453668A1/de
Priority to NL7414740A priority patent/NL7414740A/xx
Priority to AT904074A priority patent/AT348263B/de
Priority to FR7437600A priority patent/FR2250635B1/fr
Publication of US3923557A publication Critical patent/US3923557A/en
Application granted granted Critical
Priority to SE8103564A priority patent/SE8103564L/sv
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
    • B23K20/233—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer
    • B23K20/2336—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer both layers being aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/016—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of aluminium or aluminium alloys

Definitions

  • the silicon and manganese ranges are controlled [52] US. Cl. 148/32; 75/141; 74/146; to provide an alnminnm si]icon Solid Solution and to 75/148 restrict or eliminate cathodic particles which have [51] Int. Cl. C22C 21/02 been f d to Cause nits.
  • the alloy is highly resistant [58] Field of Search 75/141, 142, 143, 138, to Corrosion, especially in environments where the 75/1471 146; 148/327 alloy comes into contact with impure water.
  • composition of the alloy of the present invention in the following description of the preferred embodiments is given in weight percentages unless otherwise specified.
  • the essential components of the alloy are manganese and silicon.
  • the remaining elements may be present as impurities up to the level shown in Table I.
  • Titanium may be present as a purposeful addition for grain refinement of the alloy.
  • the zinc has not been found to have any detrimental effects on the corrosion behavior of the alloy and its level has been chosen to permit the use of zinc bearing scrap in the production of the alloy.
  • any of the foregoing impurities may be present in levels as low as 0.001%.
  • a major cause of pitting corrosion in aluminum alloys is the presence of particles in the alloys which are cathodic or anodic to the matrix of the alloy. Such particles act to set up galvanic cells when the alloy is in a conducting medium. Such cells act as initiation sites for the formation of pits. Particles which are likely to cause pitting include; silicon, FeAl CuAl MnAl and a(Al- FeSi). In the course of the present research it was found that the presence of a cathodic particle of FeAl in a 6061 Alloy could lead to "the formation of a pit in as little as one hour when the alloy was exposed to flowing tap water at a" temperature of 30C.
  • the alloy composition of the present invention has been selected on the basis of the constitutional relationship which has been derived for the aluminummanganese-silicon-iron quaternary system by H. W. L. Phillips, Journal of the Institute of Metals, Vol. LXIX, 1943. From this phase diagram it appears that the presence of about 0.4% manganese will surpress the formation of the FeAl particles. However, particles of a(Al- FeSi) remain. For this reason the iron concentration in the present invention has been limited, since a(AlFeSi) particles are also detrimental to the corrosion behavior of aluminum alloys, although to a much lesser degree than FeAl; particles.
  • EXAMPLE I A series of castings were made using high purity aluminum as a base.
  • the high purity aluminum contained the following impurities; 0.001% iron and 0.001% silicon. To this base the following deliberate additions were made:
  • Example I employed a test in which the water was changed only once a week and it is evident that over a period of one week the chloride concentration decreases significantly. Because of the corrosive effect of chloride ions, subsequent tests were performed using continuous replenishment of the tap water in order to increase the severity of the test.
  • EXAMPLE II A series of experimental ingots were cast using a high purity aluminum base but containing from 0.05 to 0.063% iron. The composition of these alloys is given in Table III along with 60 day corrosion data.
  • the alloys of the present invention have a wide potential area of usefulness, encompassing almost any application in which a metallic article must come into contact with relatively impure water or other aqueous media.
  • Typical of such applications are tubing or piping for the flow of aqueous media and heat exchangers for the transfer of heat to or from an aqueous medium.
  • the alloy of the present invention is particularly suitable for the fabrication of thin wall tubing, as for example welded tubing formed from metal strips.
  • Such tubing would normally have a wall thickness of from 0.02 to 0.375 inch depending upon the tube diameter, and a diameter of from 16 inch to 16 inches.
  • thick wall tubing and piping may be fabricated having a wall thickness of as much as 1.0 inch.
  • the alloy of the present invention may also be used in the fabrication of items such as tube sheets, and tube spacers and supports.
  • the alloy of the present invention is useful whenever aqueous corrosion problems are ento 0.8% manganese, from 0.001 to 0.2% iron, from 0.001 to 0.1% chromium, from 0.001 to 0.1% magnesium, from 0.001 to 0.1% copper, from 0.001 to 0.05% titanium, from 0.001 to 0.1% zinc, balance aluminum.
  • An alloy according to claim 1 containing from 0.001 to 0.05% chromium, from 0.001 to 0.05% copper, from 0.005 to 0.015% titanium, and from 0.001 to 0.05% zinc.
  • An aluminum base alloy article highly resistant to pitting and corrosion in an aqueous environment wherein the alloy consists essentially of from 0.05 to 0.5% silicon, wherein the silicon is present in solid solution, from 0.2 to 0.8% manganese, from 0.001 to 0.2% iron, from 0.001 to 0.1% chromium, from 0.001 to 0.1% magnesium, from 0.001 to 0.1% copper, from 0.001 to 0.05% titanium, from 0.001 to 0.1% zinc, balance aluminum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)
US451074A 1973-11-12 1974-03-14 Corrosion resistant aluminum alloys Expired - Lifetime US3923557A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US451074A US3923557A (en) 1973-11-12 1974-03-14 Corrosion resistant aluminum alloys
CA209,329A CA1028175A (en) 1973-11-12 1974-09-16 Corrosion resistant aluminum alloy composite
CH1483974A CH611934A5 (pm) 1973-11-12 1974-11-06
NO74744053A NO136677C (no) 1973-11-12 1974-11-11 Korrosjonsfast sammensatt materiale best}ende av aluminiumlegeringer
JP49129822A JPS50112209A (pm) 1973-11-12 1974-11-11
SE7414121A SE421326B (sv) 1973-11-12 1974-11-11 Aluminiumforemal av en forsta aluminiumlegering med god korrosions- och gropfretningsherdighet metallurgiskt forenat med ett pleteringsskikt av en andra aluminiumlegering samt anvendning av detsamma
DE19742453668 DE2453668A1 (de) 1973-11-12 1974-11-12 Korrosionsfestes aluminiumverbundmaterial
NL7414740A NL7414740A (nl) 1973-11-12 1974-11-12 Corrosiebestendige, samengestelde aluminium- materialen.
AT904074A AT348263B (de) 1973-11-12 1974-11-12 Gegenstand aus einer aluminiumlegierung mit hohem widerstand gegen lochkorrosion
FR7437600A FR2250635B1 (pm) 1973-11-12 1974-11-14
SE8103564A SE8103564L (sv) 1973-11-12 1981-06-05 Korrosionsherdigt material av aluminiumlegering

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US414862A US3878871A (en) 1973-11-12 1973-11-12 Corrosion resistant aluminum composite
US451074A US3923557A (en) 1973-11-12 1974-03-14 Corrosion resistant aluminum alloys

Publications (1)

Publication Number Publication Date
US3923557A true US3923557A (en) 1975-12-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US451074A Expired - Lifetime US3923557A (en) 1973-11-12 1974-03-14 Corrosion resistant aluminum alloys

Country Status (10)

Country Link
US (1) US3923557A (pm)
JP (1) JPS50112209A (pm)
AT (1) AT348263B (pm)
CA (1) CA1028175A (pm)
CH (1) CH611934A5 (pm)
DE (1) DE2453668A1 (pm)
FR (1) FR2250635B1 (pm)
NL (1) NL7414740A (pm)
NO (1) NO136677C (pm)
SE (2) SE421326B (pm)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2904219A1 (de) * 1978-02-24 1979-08-30 Alusuisse Korrosionsbestaendige aluminiumlegierung
US4649087A (en) * 1985-06-10 1987-03-10 Reynolds Metals Company Corrosion resistant aluminum brazing sheet
US4828794A (en) * 1985-06-10 1989-05-09 Reynolds Metals Company Corrosion resistant aluminum material
US5021106A (en) * 1988-10-21 1991-06-04 Showa Aluminum Brazeable aluminum alloy sheet and process of making same
WO1991014794A1 (en) * 1990-03-27 1991-10-03 Alcan International Limited Improved aluminum alloy
US6368427B1 (en) 1999-09-10 2002-04-09 Geoffrey K. Sigworth Method for grain refinement of high strength aluminum casting alloys
US6645321B2 (en) 1999-09-10 2003-11-11 Geoffrey K. Sigworth Method for grain refinement of high strength aluminum casting alloys
EP1840487A1 (en) * 2006-03-31 2007-10-03 Aro Tubi Trafilerie S.P.A. Endless capillary tubes in aluminium alloy, lamination valves comprising aluminium alloy capillary tubes and an aluminium alloy
US20130302643A1 (en) * 2011-01-21 2013-11-14 Hydro Aluminium Rolled Products Gmbh Aluminium alloy free from si primary particles
US10287440B2 (en) 2014-07-16 2019-05-14 Thyssenkrupp Steel Europe Ag Steel product with an anticorrosive coating of aluminum alloy and method for the production thereof

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5376113A (en) * 1976-12-20 1978-07-06 Mitsubishi Aluminium Aluminum alloy having good highhtemperature sagging property and sacrifice anode property
JPS575841A (en) * 1980-06-12 1982-01-12 Mitsubishi Alum Co Ltd Aluminum alloy excellent in pitting corrosion-resistance
JPS5845367A (ja) * 1981-09-14 1983-03-16 Kiyoteru Takayasu 耐蝕材料
JPS6350451A (ja) * 1986-08-19 1988-03-03 Furukawa Alum Co Ltd 冷間加工性の優れた耐食アルミニウム合金薄肉管の製造法
JP2630427B2 (ja) * 1988-05-20 1997-07-16 株式会社荏原製作所 セラミックス製バイヨネット式熱交換器
JPH02129337A (ja) * 1988-11-10 1990-05-17 Furukawa Alum Co Ltd アルミニウムフィン材
PL2090425T3 (pl) 2008-01-18 2014-03-31 Hydro Aluminium Rolled Prod Tworzywo kompozytowe z warstwą antykorozyjną i sposób jego wytwarzania

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3219492A (en) * 1962-11-16 1965-11-23 Aluminum Co Of America Thermal treatment of aluminum base alloy product
US3639107A (en) * 1969-07-22 1972-02-01 Aluminum Co Of America Hot-dip-aluminizing alloy

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3219492A (en) * 1962-11-16 1965-11-23 Aluminum Co Of America Thermal treatment of aluminum base alloy product
US3639107A (en) * 1969-07-22 1972-02-01 Aluminum Co Of America Hot-dip-aluminizing alloy

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2904219A1 (de) * 1978-02-24 1979-08-30 Alusuisse Korrosionsbestaendige aluminiumlegierung
US4649087A (en) * 1985-06-10 1987-03-10 Reynolds Metals Company Corrosion resistant aluminum brazing sheet
US4828794A (en) * 1985-06-10 1989-05-09 Reynolds Metals Company Corrosion resistant aluminum material
US5021106A (en) * 1988-10-21 1991-06-04 Showa Aluminum Brazeable aluminum alloy sheet and process of making same
WO1991014794A1 (en) * 1990-03-27 1991-10-03 Alcan International Limited Improved aluminum alloy
US6368427B1 (en) 1999-09-10 2002-04-09 Geoffrey K. Sigworth Method for grain refinement of high strength aluminum casting alloys
US6645321B2 (en) 1999-09-10 2003-11-11 Geoffrey K. Sigworth Method for grain refinement of high strength aluminum casting alloys
EP1840487A1 (en) * 2006-03-31 2007-10-03 Aro Tubi Trafilerie S.P.A. Endless capillary tubes in aluminium alloy, lamination valves comprising aluminium alloy capillary tubes and an aluminium alloy
US20130302643A1 (en) * 2011-01-21 2013-11-14 Hydro Aluminium Rolled Products Gmbh Aluminium alloy free from si primary particles
US10287440B2 (en) 2014-07-16 2019-05-14 Thyssenkrupp Steel Europe Ag Steel product with an anticorrosive coating of aluminum alloy and method for the production thereof

Also Published As

Publication number Publication date
SE7414121L (pm) 1975-05-13
NO136677B (pm) 1977-07-11
FR2250635B1 (pm) 1979-02-23
NL7414740A (nl) 1975-05-14
NO136677C (no) 1977-10-19
AT348263B (de) 1979-02-12
CH611934A5 (pm) 1979-06-29
SE8103564L (sv) 1981-06-05
FR2250635A1 (pm) 1975-06-06
ATA904074A (de) 1978-06-15
SE421326B (sv) 1981-12-14
CA1028175A (en) 1978-03-21
JPS50112209A (pm) 1975-09-03
NO744053L (pm) 1975-06-09
DE2453668A1 (de) 1975-05-15

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