US2952509A - Corrosion inhibition - Google Patents

Corrosion inhibition Download PDF

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Publication number
US2952509A
US2952509A US712642A US71264258A US2952509A US 2952509 A US2952509 A US 2952509A US 712642 A US712642 A US 712642A US 71264258 A US71264258 A US 71264258A US 2952509 A US2952509 A US 2952509A
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United States
Prior art keywords
acid
corrosion
percent
metallic surfaces
oxidizing
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Expired - Lifetime
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US712642A
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Roger F Monroe
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Dow Chemical Co
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Dow Chemical Co
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    • 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
    • C23F11/04—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly acid liquids
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S507/00—Earth boring, well treating, and oil field chemistry
    • Y10S507/933—Acidizing or formation destroying
    • Y10S507/934—Acidizing or formation destroying with inhibitor

Definitions

  • the present invention relates to corrosion inhibition and is more particularly concerned with the inhibition of corrosion of metallic surfaces subjected to acid conditions.
  • a further object of the present invention is to provide a relatively non-toxic material which exhibits good corrosion inhibition of metallic surfaces when added to acid solutions.
  • 2-(2-propynyloxy)tetrahydropyran is added to an aqueous solution of a non-oxidizing acid such as hydrochloric acid, phosphoric acid or sulfuric acid in an amount of from 0.1 to about 1.0 percent by weight.
  • a non-oxidizing acid such as hydrochloric acid, phosphoric acid or sulfuric acid
  • the compound of the present invention is operative to prevent the corrosion of metal in contact with a non-oxidizing acid, such as sulfuric, acetic or phosphoric, for example, and at temperatures as high as about 200 F.
  • a non-oxidizing acid such as sulfuric, acetic or phosphoric
  • a major advantage of the inhibitor of the invention is that it is easily and safely handled and used because of its low toxicity, low volatility and lack of irritant properties.
  • a metallic-corrosion-inhibited acid which comprises an aqueous solution of non-oxidizing acid and from 0.1 to 1.0 percent by weight of 2-(2-propynyloxy)tetrahydropyran.
  • a method for the prevention of corrosion of ferrous and nickel containing metallic surfaces by nonoxidizing acids at temperatures below about 200 F. which comprises the steps of introducing into an aqueous solution of a non-oxidizing acid from 0.1 to 1.0 percent by weight of 2-(2-propynyloxy(tetrahydropyran and subsequently contacting said so-inhibited acid with metallic surfaces.
  • a method for the prevention of corrosion of ferrous metallic surfaces by non-oxidizing acids at temperatures below about 200 F. which comprises the steps of introducing into an aqueous solution of a non-oxidizing acid from 0.1 to 1.0 percent by weight of 2-(2 propynyloxy)tetrahydropyran and subsequently contacting said so-inhibited acid with said metallic surfaces.
  • a method for the prevention of corrosion of steel surfaces by non-oxidizing acids at temperatures below about 200 F. which comprises the steps of introducing into an aqueous solution of a non-oxidizing acid from 0.1 to 1.0 percent by weight of 2-(2-propynyloxy)tetrahydropyran and subsequently contacting said so-inhibited acid with said metallic surfaces.
  • a method for the prevention of corrosion of nickel containing surfaces by non-oxidizing acids at temperatures below about 200 F. which comprises the steps of introducing into an aqueous solution of a non-oxidizing acid from 0.1 to 1.0 percent by weight of 2-(2-propynyloxy)tetrahydropyran and subsequently contacting said so-inhibited acid with said metallic surfaces.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Description

United States Patent CORROSION INHIBITION Roger F. Monroe, Midland, Mich., assignor to The Dow Chemical Company, Midland, Mich., a corporation of Delaware No Drawing. Filed Feb. '3, 1958, Ser. No. 712,642 Claims. (Cl. 21-2.5)
The present invention relates to corrosion inhibition and is more particularly concerned with the inhibition of corrosion of metallic surfaces subjected to acid conditions.
It is an object of the present invention to provide a material which can be added to acid solutions and which material will prevent the corrosion of metal surfaces which come into contact with the acid solution. A further object of the present invention is to provide a relatively non-toxic material which exhibits good corrosion inhibition of metallic surfaces when added to acid solutions. These and other objects will become apparent to those skilled in the art from the following specification and claims.
It has now been found that 2-(2-propynyloxy)tetra- 'hydropyran when added to acid solutions will prevent the corrosion of metallic surfaces such as the ferrous metals, black iron, the stainless steels, nickel, and the like, which come into contact with the acid. Good results are obtained when employing from 0.1 to 1.0 percent by weight of 2-(2propynyloxy)tetrahydropyran in the acid solution and temperatures below about 200 F.
In carrying out the present invention 2-(2-propynyloxy)tetrahydropyran is added to an aqueous solution of a non-oxidizing acid such as hydrochloric acid, phosphoric acid or sulfuric acid in an amount of from 0.1 to about 1.0 percent by weight.
It is to be understood that both dilute and concentrated aqueous acids, even including the commercial concentrated acids, are inhibited in accordance with the present invention.
The following example is illustrative of the present invention but is not to be construed as limiting.
Example Corrlslon Hydrochloric Acid Temp., Rate F. (Lbs/sq.
ft. day) percent 150 0. 0043 175 0. 0023 percent 200 1. 2
It is thus apparent that the compound of the present invention is operative to prevent the corrosion of metal in contact with a non-oxidizing acid, such as sulfuric, acetic or phosphoric, for example, and at temperatures as high as about 200 F.
A major advantage of the inhibitor of the invention is that it is easily and safely handled and used because of its low toxicity, low volatility and lack of irritant properties.
I claim:
1. A metallic-corrosion-inhibited acid which comprises an aqueous solution of non-oxidizing acid and from 0.1 to 1.0 percent by weight of 2-(2-propynyloxy)tetrahydropyran.
2. A method for the prevention of corrosion of ferrous and nickel containing metallic surfaces by nonoxidizing acids at temperatures below about 200 F. which comprises the steps of introducing into an aqueous solution of a non-oxidizing acid from 0.1 to 1.0 percent by weight of 2-(2-propynyloxy(tetrahydropyran and subsequently contacting said so-inhibited acid with metallic surfaces.
3. A method for the prevention of corrosion of ferrous metallic surfaces by non-oxidizing acids at temperatures below about 200 F. which comprises the steps of introducing into an aqueous solution of a non-oxidizing acid from 0.1 to 1.0 percent by weight of 2-(2 propynyloxy)tetrahydropyran and subsequently contacting said so-inhibited acid with said metallic surfaces.
4. A method for the prevention of corrosion of steel surfaces by non-oxidizing acids at temperatures below about 200 F. which comprises the steps of introducing into an aqueous solution of a non-oxidizing acid from 0.1 to 1.0 percent by weight of 2-(2-propynyloxy)tetrahydropyran and subsequently contacting said so-inhibited acid with said metallic surfaces.
5. A method for the prevention of corrosion of nickel containing surfaces by non-oxidizing acids at temperatures below about 200 F. which comprises the steps of introducing into an aqueous solution of a non-oxidizing acid from 0.1 to 1.0 percent by weight of 2-(2-propynyloxy)tetrahydropyran and subsequently contacting said so-inhibited acid with said metallic surfaces.
References Cited in the file of this patent UNITED STATES PATENTS 1,877,504 Grebe et a1. Sept. 13, 1932 2,171,011 Shelley Aug. 29, 1939 2,564,758 Haggard Aug. 21, 1951 2,582,129 Jacoby Jan. 8, 1952 2,802,878 Monroe et a1. Aug. 13, 1957 2,877,188 Liddel Mar. 10, 1959

Claims (1)

  1. 2. A METHOD FOR THE PREVENTION OF CORROSION OF FERROUS AND NICKEL CONTAINING METALLIC SURFACES BY NONOXIDIZING ACIDS AT TEMPERATURES BELOW ABOUT 200*F. WHICH COMPRISES THE STEPS OF INTRODUCING INTO AN AQUEOUS SOLUTION OF A NON-OXIDIZING ACID FROM 0.1 TO 1.0 PERCENT BY WEIGHT OF 2-(2-PROPYNYLOXY) TETRAHYDROPYRAN AND SUBSEQUENTLY CONTACTING SAID SO-INHIBITED ACID WITH METALLIC SURFACES.
US712642A 1958-02-03 1958-02-03 Corrosion inhibition Expired - Lifetime US2952509A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3248334A (en) * 1961-04-24 1966-04-26 Dow Chemical Co Corrosion inhibited aqueous nonoxidizing acid compositions

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877504A (en) * 1932-06-30 1932-09-13 Dow Chemical Co Treatment of deep wells
US2171011A (en) * 1938-04-25 1939-08-29 Dow Chemical Co Treatment of wells
US2564758A (en) * 1950-06-03 1951-08-21 Hercules Powder Co Ltd Corrosion inhibitor composition
US2582129A (en) * 1948-09-13 1952-01-08 Nat Aluminate Corp Prevention of corrosion in aqueous systems
US2802878A (en) * 1956-08-02 1957-08-13 Dow Chemical Co 1-ethynyl-cyclohexyloxyalkanols
US2877188A (en) * 1956-07-27 1959-03-10 Hagan Chemicals & Controls Inc Corrosion inhibitors and method of using same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877504A (en) * 1932-06-30 1932-09-13 Dow Chemical Co Treatment of deep wells
US2171011A (en) * 1938-04-25 1939-08-29 Dow Chemical Co Treatment of wells
US2582129A (en) * 1948-09-13 1952-01-08 Nat Aluminate Corp Prevention of corrosion in aqueous systems
US2564758A (en) * 1950-06-03 1951-08-21 Hercules Powder Co Ltd Corrosion inhibitor composition
US2877188A (en) * 1956-07-27 1959-03-10 Hagan Chemicals & Controls Inc Corrosion inhibitors and method of using same
US2802878A (en) * 1956-08-02 1957-08-13 Dow Chemical Co 1-ethynyl-cyclohexyloxyalkanols

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3248334A (en) * 1961-04-24 1966-04-26 Dow Chemical Co Corrosion inhibited aqueous nonoxidizing acid compositions

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