US2923747A - Prevention of corrosion - Google Patents
Prevention of corrosion Download PDFInfo
- Publication number
- US2923747A US2923747A US726615A US72661558A US2923747A US 2923747 A US2923747 A US 2923747A US 726615 A US726615 A US 726615A US 72661558 A US72661558 A US 72661558A US 2923747 A US2923747 A US 2923747A
- Authority
- US
- United States
- Prior art keywords
- percent
- volume
- corrosion
- nitromethane
- dioxane
- 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
- C23F11/10—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 organic inhibitors
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
- C07C17/42—Use of additives, e.g. for stabilisation
Definitions
- the present invention relates to the prevention of the corrosion of metals by polychlorinated hydrocarbons.
- nitromethane and 1,4-dioxane when employed in amounts as low as 0.1 percent by volume of solvent mixture will substantially inhibit the corrosive attack of the polychlorinated hydrocarbons on aluminum.
- These components of the new composition can be employed in amounts of from 95 to 5 percent by volume of nitromethane to 5 to 95 percent by volume of 1,4-dioxane. Good results have been obtained when the ratio of components is about 1 to 1 and .the composition is employed in amounts of from 0.1 to 3 percent by volume of the halogenated hydrocarbon solvent.
- Example 1 A 50 ml. portion of commercial methylene chloride containing one or more of the various impurities found in degreasing baths was heated at the reflux temperature until visual observation showed black spots and/or pits on and in a 28 aluminum strip suspended half in the liquid phase and half in the vapor phase of the refluxing solvent.
- the following table records the results of the visual observations:
- AMethylene chloride B-Methylene chloride plus 0.5 percent by volume of vinylidene chloride "ice C-Methylene chloride plus 1 gram of Fe O DMethylene chloride plus 0.5 percent by volume of vinylidene chloride plus 1 gram of Fe O Days to Example Test Solution First N 0. Visual Corrosion 1 A.- 26 2 B--- 8 (l-.. 5 4 D.-- 10 5 B Plus 3 percent by vol. 1,4-dioxane 99 6 D Plus 3 percent by vol 1-4-dioxane..- 89 7 B Plus 3 percent by vol mtromethaue... 90 8 D Plus 3 percent by vol. nitromethane... 98 9 D+1 percent by vol.
- 1,4-dioxane 1 percent nitromethane 216
- nitromethane and 1,4-diox'ane inhibits the corrosion of aluminum when subjected to chlorinated hydrocarbons up to at least 2 /2 times to 3 times as long as either compound alone when employed in equivalent amounts.
- Hydrocarbon solvents which are inhibited in the same manner are, in general, any polychlorinated aliphatic hydrocarbon, such as'for example, carbon tetrachloride, 1,2-dichloroethane, 1,1,1-trichloroethane, tetrachloroethylene, chloroform and trichloroethylene.
- any polychlorinated aliphatic hydrocarbon such as'for example, carbon tetrachloride, 1,2-dichloroethane, 1,1,1-trichloroethane, tetrachloroethylene, chloroform and trichloroethylene.
- a polychlorinated aliphatic hydrocarbon corrosion inhibitor composition comprising a mixture of from 5 to percent by volume of nitromethane and from 95 to 5 percent by volume of 1,4-diox'ane, respectively.
- a corrosion inhibitor for use with polychlorinated aliphatic hydrocarbons which comprises a mixture of from 5 to 95 percent by volume of nitromethane and from 95 to 5 percent by volume of 1,4-dioxane.
- a corrosion inhibited polychlorinated hydrocarbon composition comprising a polychlorinated aliphatic hydrocarbon and from 0.1 to 3 percent by volume of a mixture consisting of .from 5 to 95 percent by volume of nitromethane and from 95 to 5 percent by volume of 1,4-dioxane, respectively.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
PREVENTION OF CORROSION Donald E. Rapp, Midland, Mich., assignor to The Dow Chemical Company, Midland, Mich., a corporation of Delaware No Drawing. Application April 7, 1958 Serial No. 726,615
3 Claims. (Cl. 260-6525) The present invention relates to the prevention of the corrosion of metals by polychlorinated hydrocarbons.
. Various metals are attacked by the polychlorinated aliphatic hydrocarbon solvents which are employed in degreasing operations and the like. Many inhibitor compositions have been suggested and employed to control this corrosion. It has been found that aluminum metal presents the most diflicult corrosion problems and that control of corrosion of aluminum is the ultimate goal to be achieved.
It has been found that a mixture of nitromethane and 1,4-dioxane when employed in amounts as low as 0.1 percent by volume of solvent mixture will substantially inhibit the corrosive attack of the polychlorinated hydrocarbons on aluminum. These components of the new composition can be employed in amounts of from 95 to 5 percent by volume of nitromethane to 5 to 95 percent by volume of 1,4-dioxane. Good results have been obtained when the ratio of components is about 1 to 1 and .the composition is employed in amounts of from 0.1 to 3 percent by volume of the halogenated hydrocarbon solvent.
The following examples illustrate the present invention but are not to be construed as limiting.
Example 1 A 50 ml. portion of commercial methylene chloride containing one or more of the various impurities found in degreasing baths was heated at the reflux temperature until visual observation showed black spots and/or pits on and in a 28 aluminum strip suspended half in the liquid phase and half in the vapor phase of the refluxing solvent. The following table records the results of the visual observations:
Test solutions:
AMethylene chloride B-Methylene chloride plus 0.5 percent by volume of vinylidene chloride "ice C-Methylene chloride plus 1 gram of Fe O DMethylene chloride plus 0.5 percent by volume of vinylidene chloride plus 1 gram of Fe O Days to Example Test Solution First N 0. Visual Corrosion 1 A.- 26 2 B--- 8 (l-.. 5 4 D.-- 10 5 B Plus 3 percent by vol. 1,4-dioxane 99 6 D Plus 3 percent by vol 1-4-dioxane..- 89 7 B Plus 3 percent by vol mtromethaue... 90 8 D Plus 3 percent by vol. nitromethane... 98 9 D+1 percent by vol. 1,4-dioxane 1 percent nitromethane 216 Thus it is apparent that the combination of nitromethane and 1,4-diox'ane inhibits the corrosion of aluminum when subjected to chlorinated hydrocarbons up to at least 2 /2 times to 3 times as long as either compound alone when employed in equivalent amounts.
Hydrocarbon solvents which are inhibited in the same manner are, in general, any polychlorinated aliphatic hydrocarbon, such as'for example, carbon tetrachloride, 1,2-dichloroethane, 1,1,1-trichloroethane, tetrachloroethylene, chloroform and trichloroethylene.
I claim:
1. A polychlorinated aliphatic hydrocarbon corrosion inhibitor composition comprising a mixture of from 5 to percent by volume of nitromethane and from 95 to 5 percent by volume of 1,4-diox'ane, respectively.
2. A corrosion inhibitor for use with polychlorinated aliphatic hydrocarbons which comprises a mixture of from 5 to 95 percent by volume of nitromethane and from 95 to 5 percent by volume of 1,4-dioxane.
3. A corrosion inhibited polychlorinated hydrocarbon composition comprising a polychlorinated aliphatic hydrocarbon and from 0.1 to 3 percent by volume of a mixture consisting of .from 5 to 95 percent by volume of nitromethane and from 95 to 5 percent by volume of 1,4-dioxane, respectively.
Claims (1)
1. A POLYCHLORINATED ALIPHATIC HYDROCARBON CORROSION INHIBITOR COMPOSITION COMPRISING A MIXTURE OF FROM 5 TO 95 PERCENT BY VOLUME OF NITROMETHANE AND FROM 95 TO 5 PERCENT BY VOLUME OF 1,4-DIOXANE, RESPECTIVELY.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US726615A US2923747A (en) | 1958-04-07 | 1958-04-07 | Prevention of corrosion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US726615A US2923747A (en) | 1958-04-07 | 1958-04-07 | Prevention of corrosion |
Publications (1)
Publication Number | Publication Date |
---|---|
US2923747A true US2923747A (en) | 1960-02-02 |
Family
ID=24919317
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US726615A Expired - Lifetime US2923747A (en) | 1958-04-07 | 1958-04-07 | Prevention of corrosion |
Country Status (1)
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US (1) | US2923747A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3049571A (en) * | 1960-03-18 | 1962-08-14 | Dow Chemical Co | Stabilized degreasing solvent |
US3159582A (en) * | 1960-02-23 | 1964-12-01 | Ethyl Corp | Stable solvent compositions |
US3189552A (en) * | 1963-02-05 | 1965-06-15 | Ethyl Corp | Stable solvent composition |
US3192273A (en) * | 1961-08-14 | 1965-06-29 | Pittsburgh Plate Glass Co | Stabilization of methylchloroform |
US3238137A (en) * | 1961-03-29 | 1966-03-01 | Ethyl Corp | Stable solvent compositions |
US3282853A (en) * | 1964-03-24 | 1966-11-01 | Du Pont | Azeotropic composition and process for attenuating magnetic ink characters |
US3532761A (en) * | 1969-05-07 | 1970-10-06 | Ppg Industries Inc | Stabilization of methyl chloroform |
US3536766A (en) * | 1968-12-26 | 1970-10-27 | Dow Chemical Co | Stabilized methyl chloroform composition |
JPS4874103A (en) * | 1971-12-29 | 1973-10-05 | ||
US4026956A (en) * | 1972-09-13 | 1977-05-31 | Ppg Industries, Inc. | Storage stabilized methylchloroform formulations |
US4524011A (en) * | 1982-11-08 | 1985-06-18 | The Dow Chemical Company | Flux removal solvent blend |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2371645A (en) * | 1943-09-16 | 1945-03-20 | Westvaco Chlorine Products Cor | Degreasing process |
US2371644A (en) * | 1942-10-01 | 1945-03-20 | Westvaco Chlorine Products Cor | Degreasing process |
US2436772A (en) * | 1945-08-24 | 1948-02-24 | Du Pont | Solvent for degreasing iron and aluminum |
US2567621A (en) * | 1950-05-23 | 1951-09-11 | Diamond Alkali Co | Stabilized tetrachloroethylene composition |
US2811252A (en) * | 1954-03-30 | 1957-10-29 | Dow Chemical Co | Methyl chloroform inhibited with dioxane |
-
1958
- 1958-04-07 US US726615A patent/US2923747A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2371644A (en) * | 1942-10-01 | 1945-03-20 | Westvaco Chlorine Products Cor | Degreasing process |
US2371645A (en) * | 1943-09-16 | 1945-03-20 | Westvaco Chlorine Products Cor | Degreasing process |
US2436772A (en) * | 1945-08-24 | 1948-02-24 | Du Pont | Solvent for degreasing iron and aluminum |
US2567621A (en) * | 1950-05-23 | 1951-09-11 | Diamond Alkali Co | Stabilized tetrachloroethylene composition |
US2811252A (en) * | 1954-03-30 | 1957-10-29 | Dow Chemical Co | Methyl chloroform inhibited with dioxane |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3159582A (en) * | 1960-02-23 | 1964-12-01 | Ethyl Corp | Stable solvent compositions |
US3049571A (en) * | 1960-03-18 | 1962-08-14 | Dow Chemical Co | Stabilized degreasing solvent |
US3238137A (en) * | 1961-03-29 | 1966-03-01 | Ethyl Corp | Stable solvent compositions |
US3192273A (en) * | 1961-08-14 | 1965-06-29 | Pittsburgh Plate Glass Co | Stabilization of methylchloroform |
US3189552A (en) * | 1963-02-05 | 1965-06-15 | Ethyl Corp | Stable solvent composition |
US3282853A (en) * | 1964-03-24 | 1966-11-01 | Du Pont | Azeotropic composition and process for attenuating magnetic ink characters |
US3536766A (en) * | 1968-12-26 | 1970-10-27 | Dow Chemical Co | Stabilized methyl chloroform composition |
US3532761A (en) * | 1969-05-07 | 1970-10-06 | Ppg Industries Inc | Stabilization of methyl chloroform |
JPS4874103A (en) * | 1971-12-29 | 1973-10-05 | ||
JPS5319161B2 (en) * | 1971-12-29 | 1978-06-19 | ||
US4026956A (en) * | 1972-09-13 | 1977-05-31 | Ppg Industries, Inc. | Storage stabilized methylchloroform formulations |
US4524011A (en) * | 1982-11-08 | 1985-06-18 | The Dow Chemical Company | Flux removal solvent blend |
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