US2028343A - Method and means for protecting magnesium and magnesium alloys - Google Patents
Method and means for protecting magnesium and magnesium alloys Download PDFInfo
- Publication number
- US2028343A US2028343A US627105A US62710532A US2028343A US 2028343 A US2028343 A US 2028343A US 627105 A US627105 A US 627105A US 62710532 A US62710532 A US 62710532A US 2028343 A US2028343 A US 2028343A
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- US
- United States
- Prior art keywords
- magnesium
- alloys
- protecting
- magnesium alloys
- liquid
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/18—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
Definitions
- the present invention relates to a method and means for protecting magnesium and magnesium alloys from the action of certain organic substances, and particularly of polyhydric alcohols and aqueous solutions of same.
- the following table is illustrative of the comparative eifect of an addition of alkali fluoride.
- the last column of the table gives the reduction in weight suffered, in the course of 24 hours, by 1 sq. meter of a sheet of magnesium alloy (composed of 6 per cent of aluminium, 1 per cent of zinc, 0.3 per cent of manganese, balance being magnesium) when exposed to the action of variouscooling compositions containing a polyhydric alcohol, with and without the addition of an alkali fluoride,'the loss in weight, of course. being representative of the corroding eflect.
- a method of preventing the corroding action, upon magnesium and magnesium alloys, of a liquid consisting of a. polyhydric alcohol which comprises incorporating in said liquid a minor quantity, amounting to at least about 0.1 per cent by weight of the total liquid, of an alkali fluoride.
- a method of preventing the corroding action, upon magnesium and magnesium alloys, of a polyhydric alcohol which comprises incorporating in said alcohol a minor quantity, amounting to at least about 0.1 per cent by weight of the total liquid, of potassium fluoride.
- a liquid cooling medium for internal combustion engines incapable of attacking magnesium and magnesium alloys, which comprises a major quantity of a poly ydric alcohol and a minor quantity of an alkali fluoride.
- a liquid cooling medium for internal combustion engines, incapable of attacking magnesium and magnesium alloys which consists essentially of a polyhydric alcohol and a quail- 0.1 per cent by weight of the total liquid.
- a liquid cooling medium for internal combustion engines, incapable of attacking magnesium and magnesium alloys which consists of a polyhydric alcohol and a quantity of potassium fluoride amounting to at least 0.1 per cent by weight of the total liquid.
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
Patented Jan. 21, 1936 UNITED STATES PATENT bl-FICE MAGNESIUM AND MAGNE SIUM ALLOYS Josef Martin Michel, Bitterteld, Germany, a.-
signor, by mesne assignments,
Corporation,
- Development Delaware -to Magnesium a corporation of No Drawing. Application July 30, 1932, Serial No.
627,105. In G 6 Claims.
The present invention relates to a method and means for protecting magnesium and magnesium alloys from the action of certain organic substances, and particularly of polyhydric alcohols and aqueous solutions of same.
Recently, it has repeatedly been suggested, with success, to add to the water employed as a cooling medium in internal combustion engines polyhydric alcohols such as-glycol and glycerine, or to employ the said substances as suchas cooling media so as to enhance the cooling eflect and reduce the danger of freezing under low temperature conditions. When, however, the said cooling compositions are employed in contact with magnesium or magnesium alloys, which are frequently used as a construction material for various parts of internal combustion engines, it has transpired that the-said metals are occasionally attacked by the polyhydric alcohol even at ordinary temperatures, and that such attack invariably occurs at the elevated temperatures obtaining in the working engine.
I have now observed that a small addition amounting to at least about 0.1 percent of alkali fluorides to cooling media comprising a polyhydric alcohol reduces the corroding attack upon magnesium and magnesium alloys to a negligible quantity. I
The following table is illustrative of the comparative eifect of an addition of alkali fluoride. The last column of the table gives the reduction in weight suffered, in the course of 24 hours, by 1 sq. meter of a sheet of magnesium alloy (composed of 6 per cent of aluminium, 1 per cent of zinc, 0.3 per cent of manganese, balance being magnesium) when exposed to the action of variouscooling compositions containing a polyhydric alcohol, with and without the addition of an alkali fluoride,'the loss in weight, of course. being representative of the corroding eflect.
ermany August 6, 1931 I claim:
1'. A method of preventing the corroding action, upon magnesium and magnesium alloys, of a liquid consisting substantially of a polyhydric alcohol, which comprises incorporating in said liquid a minor quantity of an alkali fluoride.
2. A method of preventing the corroding action, upon magnesium and magnesium alloys, of a liquid consisting of a. polyhydric alcohol, which comprises incorporating in said liquid a minor quantity, amounting to at least about 0.1 per cent by weight of the total liquid, of an alkali fluoride.
3. A method of preventing the corroding action, upon magnesium and magnesium alloys, of a polyhydric alcohol, which comprises incorporating in said alcohol a minor quantity, amounting to at least about 0.1 per cent by weight of the total liquid, of potassium fluoride.
4. A liquid cooling medium for internal combustion engines, incapable of attacking magnesium and magnesium alloys, which comprises a major quantity of a poly ydric alcohol and a minor quantity of an alkali fluoride. 5. A liquid cooling medium for internal combustion engines, incapable of attacking magnesium and magnesium alloys, which consists essentially of a polyhydric alcohol and a quail- 0.1 per cent by weight of the total liquid.
6. A liquid cooling medium for internal combustion engines, incapable of attacking magnesium and magnesium alloys, which consists of a polyhydric alcohol and a quantity of potassium fluoride amounting to at least 0.1 per cent by weight of the total liquid. 1
JOSEF MARTIN MICHEL.
v tity of an alkali fluoride amounting to at least
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2028343X | 1931-08-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2028343A true US2028343A (en) | 1936-01-21 |
Family
ID=7978689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US627105A Expired - Lifetime US2028343A (en) | 1931-08-06 | 1932-07-30 | Method and means for protecting magnesium and magnesium alloys |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2028343A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3024099A (en) * | 1957-05-20 | 1962-03-06 | Monsanto Chemicals | Corrosion-inhibited liquid fertilizer compositions |
-
1932
- 1932-07-30 US US627105A patent/US2028343A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3024099A (en) * | 1957-05-20 | 1962-03-06 | Monsanto Chemicals | Corrosion-inhibited liquid fertilizer compositions |
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