US3849879A - Method of making a composite magnesium-titanium conductor - Google Patents

Method of making a composite magnesium-titanium conductor Download PDF

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US3849879A
US3849879A US00402563A US40256373A US3849879A US 3849879 A US3849879 A US 3849879A US 00402563 A US00402563 A US 00402563A US 40256373 A US40256373 A US 40256373A US 3849879 A US3849879 A US 3849879A
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magnesium
alloy
molten
base alloy
titanium
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US00402563A
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H Kuchek
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Dow Chemical Co
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Dow Chemical Co
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Priority to US00402563A priority Critical patent/US3849879A/en
Priority to US493810A priority patent/US3900296A/en
Priority to CA209,204A priority patent/CA999405A/en
Priority to DE19742445018 priority patent/DE2445018A1/en
Priority to FR7432581A priority patent/FR2246030B1/fr
Priority to JP49112700A priority patent/JPS5073869A/ja
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/60—Constructional parts of cells
    • C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting

Definitions

  • a novel electrical conductor suitable for use in corrosive environments and a method of forming such conductor have surprisingly been developed.
  • the method comprises at least particallyfilling a hollow titanium body with a molten magnesium base alloy containing at least about 0.05 weight per cent lithium by first introducing the molten alloy into the titanium body and then solidifying the molten alloy.
  • the magnesium alloy contacts the inner surface of the titanium body sufficiently to maintain electrical contact between the core and cladding during use.
  • titanium includes pure titanium and titanium base alloys.
  • the magneisum alloy cored-titanium cladded composite is especially suited for use as an electrical conduc'tor in corrosive environments such as those containing a high concentration of an alkali as sodium hydroxide.
  • the titanium cladded-magnesium alloy composite of the present invention is formed by first melting either alloyed or preferably pure magnesium metal and further alloying the molten metal with about 0.05 to about weight per cent and preferably from about 0.1 to about 5 weight per cent and even more preferably from about 0.1 to about 0.5 weight per cent lithium or melting a pre-alloyed magnesium-lithium alloy and heating the molten metal to a temperature less than that at which'substantial loss of magnesium and/or-lithium occurs.
  • the metal is heated to within a temperature range of from about 1,250" F. to about 1,400 F. and preferably about 1,27 5 F. to about 1',325 F.
  • a hollow titanium body such as a rectangular or circular cylinder pipe or tube, is at least partially and preferably substantially entirely filled with the molten magnesiumlithium alloy. Such filling can be carried out by, for example, pouring the molten metal into the titanium tube. However, it is preferred to employ a titanium tube having one end thereof sealed by, for example, welding and immersing at least the open end of the tube in the mo]- ten magnesium-lithium alloy.
  • gases within the The surface of the titanium in contact with the molten magnesium is generally cleaned to remove at least any excess grease and oil present.
  • the organic contaminants are removed by well known means prior to filling or casting the tita- .or cladding and the magnesium alloy to thereby form a composite having both satisfactory physical properties and electrical conductivity for use as an electrical conductor in, for example, chlorine and sodium hydroxide producing electrolytic cells.
  • the composite of the present invention is also suitable for use as a substrate for a dimensionally stable electrode in, for example, chloralkali electrolytic cells.
  • the metals described herein are preferably the pure metals containing the impurities normally associated with the commercially obtainable metals.
  • the magnesium-lithium core alloy has a composition consisting essentially of at least about 90 weight per cent and preferably at least about 99 weight per cent magnesium together with lithium within the above described composition ranges.
  • the alloy tilled tubes were slowly removed from the molten alloy bath to solidify the Mg-Li alloy within the titanium tubes to thereby form titanium clad-Mg-Li alloy composites.
  • the voltage drop across a 6 inch length of the composite was determined at room temperature by electrically connecting a 15 ampere source to each composite and measuring the voltage drop by standard means.
  • Table .1 contains data obtained during the above described tests. This data confirms that the titanium' clad Mg-Li alloy composite has a low voltage decrease over a unit length and is suitable as an electrical conductor.
  • Examples 14 and The composite of Examples 4 and 9 were heated to and maintained at a temperature of 850 F. for one hour and-then air cooled. It was determined that the voltage decrease in a 6 inch length of the composite was not altered from that shown in Table I for Examples 4 and 5.
  • Comparative Examples A and B Two titanium tubes were filled with 99.8 weight per cent pure magnesium substantially as described for Examples l-13. The voltage drop across a 6 inch length of the solidified titanium-Mg composite was determined (as in Examples 1-13) to be 18 and 1.1 millivolts. Examples A and B confirm that consistently low voltage drops were not obtained with composites using pure magnesium as a core material.
  • Composites with a titanium alloy cladding and a magnesium-1O weight per cent lithium alloy core with acceptable properties are produced in accord with the procedure of Examples l-l 3. In a manner as described for Examples l-l 3 composites with acceptable properties are produced using molten metal temperatures of 1,250 and 1,400 F.
  • a method of making a titanium clad magnesium base alloy composite comprising at least partially filling a hollow titanium body with a molten magnesium base alloy containing at least about 0.05 weight per cent lithium and then solidifying the molten alloy to form a composite.
  • the method of claim 1 including heating the molten alloy to within the temperature range of from about 1,250 F. to about 1,400 F. before the filling step.
  • the method of claim 1 including filling a hollow titanium body, having one end enclosed, by immersing an open end portion of the body in the molten magne sium base alloy to permit the reaction between reactive gases within the body with the magnesium to thereby cause filling of the body with the molten magnesium alloy.
  • magnesium base alloy consists essentially of from about 0.05 to about 10 weight per cent lithium and the balance magnesium.
  • magnesium base alloy consists essentially of from about 0.1 to about 5 weight per cent lithium and the balance magnesium.
  • a method comprising providing a molten magnesium base alloy bath consisting essentially of about 0.05 to about 10 weight per cent lithium within a temperature range of from about 1,250 F. to about 1,400 F. and then introducing the molten alloy into a hollow titanium body by immersing at least an open end portion of the body in the molten magnesium alloy to permit reaction between reactive gases in the body with the magnesium to thereby cause filling of the body with the molten magnesium base alloy, and then cooling the magnesium base alloy filled titanium body sufficiently to cause solidification of the molt magnesium base alloy' thereby to form a titanium cladded-magnesium base alloy cored composite suited for use as an electrical conductor.
  • base alloy contains about 0.1 to about 0.5 weight per cent lithium.

Abstract

Method of introducing a molten magnesium base alloy containing at least about 0.05 weight per cent lithium into a hollow titanium body in order to form a composite suitable for use as an electrical conductor.

Description

United States Patent 1191 Kuchek Nov. 26, 1974 [54] METHOD OF MAKING A COMPOSITE 3,364,976 1 1968 Reding 164 63 MAGNESIUMJITANIUM CONDUCTOR 3,389,460 6/1968 Rubinstein et a1 29/624 3,671,415 6/1972 King et al. 204/284 Inventor: Henry Kuchek, Auburn, Mlch. 3,717,929 2/1973 Atkinson et al. 29/624 [73] Assignee: The Dow Chemical Company, FOREIGN PATENTS OR APPLICATIONS Mldland, Mlch- 448,830 6/1948 Canada 174 126 CP 22 il O 1 1973 1,045,966 10/1966 Great Britain 174/126 CP 1 pp -K 402,563 Primary ExaminerC. W. Lanham Assistant ExaminerD. C. Reiley, III 52 US. Cl 29/624, 29/5275 164/6398 Attorney Agent Firm-Robe" Selby; William 1 4/126CP M. Yates; Lloyd S. Jowanovitz [51] Int. Cl. IIOlb 13/22 [58] Field of Search 29/5275, 624; 164/98, [571 ABSTRACT 164/107, 63; 174/126 CP, DIG. 7 Method of introducing a molten magnesium base alloy containing at least about 0.05 weight per cent lithium [56] References Cited into a hollow titanium body in order to form a composite suitable for use as an electrical conductor.
9 Claims, N0 Drawings 0 METHOD OF MAKING A COMPOSITE MAGNESIUM-TITANIUM CONDUCTOR BACKGROUND OF THE INVENTION This invention pertains to an electrical conductor and more in particular to a titanium clad magnesium conductor.
It is oftentimes desirable to have an electrical conductor resistant to a corrosive environment. Electrical conductors with a casing of iron, titanium or tantalum and a core of aluminum, copper, sodium, tin or zinc, and methods of making such conductors are described in US. Pat. Nos. 3,671,415 and 3,717,929, and British Pat. Nos. 1,045,966 and 1,227,506. It is desired to provide an electrical conductor resistant to the detrimental corrosive effects of, for example, caustic environments.
SUMMARY OF THE INVENTION A novel electrical conductor suitable for use in corrosive environments and a method of forming such conductor have surprisingly been developed. The method comprises at least particallyfilling a hollow titanium body with a molten magnesium base alloy containing at least about 0.05 weight per cent lithium by first introducing the molten alloy into the titanium body and then solidifying the molten alloy. The magnesium alloy contacts the inner surface of the titanium body sufficiently to maintain electrical contact between the core and cladding during use. Herein, the term titanium includes pure titanium and titanium base alloys. v
The magneisum alloy cored-titanium cladded composite is especially suited for use as an electrical conduc'tor in corrosive environments such as those containing a high concentration of an alkali as sodium hydroxide.
DESCRIPTION OF THE PREFERRED EMBODIMENTS The titanium cladded-magnesium alloy composite of the present invention is formed by first melting either alloyed or preferably pure magnesium metal and further alloying the molten metal with about 0.05 to about weight per cent and preferably from about 0.1 to about 5 weight per cent and even more preferably from about 0.1 to about 0.5 weight per cent lithium or melting a pre-alloyed magnesium-lithium alloy and heating the molten metal to a temperature less than that at which'substantial loss of magnesium and/or-lithium occurs. Preferably the metal is heated to within a temperature range of from about 1,250" F. to about 1,400 F. and preferably about 1,27 5 F. to about 1',325 F. A hollow titanium body, such as a rectangular or circular cylinder pipe or tube, is at least partially and preferably substantially entirely filled with the molten magnesiumlithium alloy. Such filling can be carried out by, for example, pouring the molten metal into the titanium tube. However, it is preferred to employ a titanium tube having one end thereof sealed by, for example, welding and immersing at least the open end of the tube in the mo]- ten magnesium-lithium alloy. By means as generally described in U.S. Pat. No. 3,364,976, gases within the The surface of the titanium in contact with the molten magnesium is generally cleaned to remove at least any excess grease and oil present. Preferably substantially all of the organic contaminants are removed by well known means prior to filling or casting the tita- .or cladding and the magnesium alloy to thereby form a composite having both satisfactory physical properties and electrical conductivity for use as an electrical conductor in, for example, chlorine and sodium hydroxide producing electrolytic cells. The composite of the present invention is also suitable for use as a substrate for a dimensionally stable electrode in, for example, chloralkali electrolytic cells.
The metals described herein are preferably the pure metals containing the impurities normally associated with the commercially obtainable metals. Preferably the magnesium-lithium core alloy has a composition consisting essentially of at least about 90 weight per cent and preferably at least about 99 weight per cent magnesium together with lithium within the above described composition ranges.
The following examples further illustrate the inven- Examples 1-13 diameter of one-half inch, a wall thickness of 0.02 inch and one end welded closed were cleaned by washing with acetone. The cleaned tubes were then immersed (open end downwardly positioned) in a bath of the molten Mg-Li alloy for 5, 10 or 30 minute periods to filling of the tube with the molten metal.
substantially entirely fill the tubes with the Mg-Li alloy.
The alloy tilled tubes were slowly removed from the molten alloy bath to solidify the Mg-Li alloy within the titanium tubes to thereby form titanium clad-Mg-Li alloy composites.
The voltage drop across a 6 inch length of the composite was determined at room temperature by electrically connecting a 15 ampere source to each composite and measuring the voltage drop by standard means. Table .1 contains data obtained during the above described tests. This data confirms that the titanium' clad Mg-Li alloy composite has a low voltage decrease over a unit length and is suitable as an electrical conductor.
Examples 14 and The composite of Examples 4 and 9 were heated to and maintained at a temperature of 850 F. for one hour and-then air cooled. It was determined that the voltage decrease in a 6 inch length of the composite was not altered from that shown in Table I for Examples 4 and 5.
Comparative Examples A and B Two titanium tubes were filled with 99.8 weight per cent pure magnesium substantially as described for Examples l-13. The voltage drop across a 6 inch length of the solidified titanium-Mg composite was determined (as in Examples 1-13) to be 18 and 1.1 millivolts. Examples A and B confirm that consistently low voltage drops were not obtained with composites using pure magnesium as a core material.
Composites with a titanium alloy cladding and a magnesium-1O weight per cent lithium alloy core with acceptable properties are produced in accord with the procedure of Examples l-l 3. In a manner as described for Examples l-l 3 composites with acceptable properties are produced using molten metal temperatures of 1,250 and 1,400 F.
1 claim:
l. A method of making a titanium clad magnesium base alloy composite comprising at least partially filling a hollow titanium body with a molten magnesium base alloy containing at least about 0.05 weight per cent lithium and then solidifying the molten alloy to form a composite.
2. The method of claim 1 including heating the molten alloy to within the temperature range of from about 1,250 F. to about 1,400 F. before the filling step.
3. The method of claim 1 including filling a hollow titanium body, having one end enclosed, by immersing an open end portion of the body in the molten magne sium base alloy to permit the reaction between reactive gases within the body with the magnesium to thereby cause filling of the body with the molten magnesium alloy.
4. The method of claim 1 wherein the magnesium base alloy consists essentially of from about 0.05 to about 10 weight per cent lithium and the balance magnesium.
5. The method of claim 1 wherein the magnesium base alloy consists essentially of from about 0.1 to about 5 weight per cent lithium and the balance magnesium.
6. A method comprising providing a molten magnesium base alloy bath consisting essentially of about 0.05 to about 10 weight per cent lithium within a temperature range of from about 1,250 F. to about 1,400 F. and then introducing the molten alloy into a hollow titanium body by immersing at least an open end portion of the body in the molten magnesium alloy to permit reaction between reactive gases in the body with the magnesium to thereby cause filling of the body with the molten magnesium base alloy, and then cooling the magnesium base alloy filled titanium body sufficiently to cause solidification of the molt magnesium base alloy' thereby to form a titanium cladded-magnesium base alloy cored composite suited for use as an electrical conductor.
base alloy contains about 0.1 to about 0.5 weight per cent lithium.

Claims (9)

1. A METHOD OF MAKING A TITANIUM CLAD MAGNESIUM BASE ALLOY COMPOSITE COMPRISING AT LEAST PARTIALLY FILLING A HALLOW TITANIUM BODY WITH A MOLTEN MAGNESIUM BASE ALLOY CONTAINING AT LEAST ABOUT 0.05 WEIGHT PER CENT LITHIUM AND THEN SOLIDIFYING THE MOLTEN ALLOY TO FORM A COMPOSITE.
2. The method of claim 1 including heating the molten alloy to within the temperature range of from about 1,250* F. to about 1, 400* F. before the filling step.
3. The method of claim 1 including filling a hollow titanium body, having one end enclosed, by immersing an open end portion of the body in the molten magnesium base alloy to permit the reaction between reactive gases within the body with the magnesium to thereby cause filling of the body with the molten magnesium alloy.
4. The method of claim 1 wherein the magnesium base alloy consists essentially of from about 0.05 to about 10 weight per cent lithium and the balance magnesium.
5. The method of claim 1 wherein the magnesium base alloy consists essentially of from about 0.1 to about 5 weight per cent lithium and the balance magnesium.
6. A method comprising providing a molten magnesium base alloy bath consisting essentially of about 0.05 to about 10 weight per cent lithium within a temperature range of from about 1,250* F. to about 1,400* F. and then introducing the molten alloy into a hollow titanium body by immersing at least an open end portion of the body in the molten magnesium alloy to permit reaction between reactive gases in the body with the magnesium to thereby cause filling of the body with the molten magnesium base alloy, and then cooling the magnesium base alloy filled titanium body sufficiently to cause solidification of the molten magnesium base alloy thereby to form a titanium cladded-magnesium base alloy cored composite suited for use as an electrical conductor.
7. The method of claim 6 wherein the titanium body is filled with the molten magnesium alloy.
8. The method of claim 6 wherein the magnesium base alloy contains about 0.1 to about 5 weight per cent lithium.
9. The method of claim 6 wherein the magnesium base alloy contains about 0.1 to about 0.5 weight per cent lithium.
US00402563A 1973-10-01 1973-10-01 Method of making a composite magnesium-titanium conductor Expired - Lifetime US3849879A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US00402563A US3849879A (en) 1973-10-01 1973-10-01 Method of making a composite magnesium-titanium conductor
US493810A US3900296A (en) 1973-10-01 1974-08-01 Composite magnesium-titanium conductor
CA209,204A CA999405A (en) 1973-10-01 1974-09-13 Composite magnesium-titanium conductor
DE19742445018 DE2445018A1 (en) 1973-10-01 1974-09-20 MAGNESIUM-TITANIUM COMPOSITE BODY AND PROCESS FOR ITS MANUFACTURING
FR7432581A FR2246030B1 (en) 1973-10-01 1974-09-27
JP49112700A JPS5073869A (en) 1973-10-01 1974-09-30

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FR (1) FR2246030B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5275885A (en) * 1988-12-19 1994-01-04 Ngk Spark Plug Co., Ltd. Piezoelectric cable
US5287910A (en) * 1992-09-11 1994-02-22 Howmet Corporation Permanent mold casting of reactive melt
US5505246A (en) * 1994-06-17 1996-04-09 Howmet Corporation Permanent mold or die casting of titanium-aluminum alloys
DE19702953A1 (en) * 1997-01-28 1998-07-30 Daimler Benz Ag Corrosion protection layer for magnesium materials

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2640405B2 (en) * 1992-06-30 1997-08-13 三井金属鉱業株式会社 Corrosion resistant magnesium alloy

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US833290A (en) * 1904-11-30 1906-10-16 Anson Gardner Betts Electrical conductor.
CA448830A (en) * 1948-06-01 Szpinak Ignacy Bimetallic electrical conductor
GB1045966A (en) * 1963-06-10 1966-10-19 Ici Ltd Electrical conductor
US3364976A (en) * 1965-03-05 1968-01-23 Dow Chemical Co Method of casting employing self-generated vacuum
US3389460A (en) * 1966-07-07 1968-06-25 Gen Cable Corp Manufacture of bare or pre-insulated metal clad sodium conductor
US3671415A (en) * 1969-09-02 1972-06-20 Ici Ltd Continuous lead-in core for an electrode assembly
US3717929A (en) * 1970-06-03 1973-02-27 Du Pont Method of making alkali metal-filled electrical conductors and terminations therefor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA448830A (en) * 1948-06-01 Szpinak Ignacy Bimetallic electrical conductor
US833290A (en) * 1904-11-30 1906-10-16 Anson Gardner Betts Electrical conductor.
GB1045966A (en) * 1963-06-10 1966-10-19 Ici Ltd Electrical conductor
US3364976A (en) * 1965-03-05 1968-01-23 Dow Chemical Co Method of casting employing self-generated vacuum
US3389460A (en) * 1966-07-07 1968-06-25 Gen Cable Corp Manufacture of bare or pre-insulated metal clad sodium conductor
US3671415A (en) * 1969-09-02 1972-06-20 Ici Ltd Continuous lead-in core for an electrode assembly
US3717929A (en) * 1970-06-03 1973-02-27 Du Pont Method of making alkali metal-filled electrical conductors and terminations therefor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5275885A (en) * 1988-12-19 1994-01-04 Ngk Spark Plug Co., Ltd. Piezoelectric cable
US5287910A (en) * 1992-09-11 1994-02-22 Howmet Corporation Permanent mold casting of reactive melt
US5443111A (en) * 1992-09-11 1995-08-22 Howmet Corporation Permanent mold for casting reactive melt
WO1995022423A1 (en) * 1992-09-11 1995-08-24 Howmet Corporation Permanent mold casting of reactive melt
US5505246A (en) * 1994-06-17 1996-04-09 Howmet Corporation Permanent mold or die casting of titanium-aluminum alloys
DE19702953A1 (en) * 1997-01-28 1998-07-30 Daimler Benz Ag Corrosion protection layer for magnesium materials
DE19702953C2 (en) * 1997-01-28 1999-08-26 Daimlerchrysler Aerospace Ag Magnesium material with a corrosion protection layer

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CA999405A (en) 1976-11-09
DE2445018A1 (en) 1975-04-03
FR2246030A1 (en) 1975-04-25
JPS5073869A (en) 1975-06-18
FR2246030B1 (en) 1976-10-22

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