US2513131A - Method of inhibiting the corrosive effect of sulfuric acid - Google Patents
Method of inhibiting the corrosive effect of sulfuric acid Download PDFInfo
- Publication number
- US2513131A US2513131A US565401A US56540144A US2513131A US 2513131 A US2513131 A US 2513131A US 565401 A US565401 A US 565401A US 56540144 A US56540144 A US 56540144A US 2513131 A US2513131 A US 2513131A
- Authority
- US
- United States
- Prior art keywords
- sulfuric acid
- acid
- inhibiting
- weight
- corrosive effect
- 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
Links
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims description 25
- 230000002401 inhibitory effect Effects 0.000 title claims description 7
- 238000000034 method Methods 0.000 title claims description 7
- 230000000694 effects Effects 0.000 title description 3
- 239000002253 acid Substances 0.000 claims description 13
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 4
- 235000011149 sulphuric acid Nutrition 0.000 claims 1
- 229910015900 BF3 Inorganic materials 0.000 description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 5
- 229910052796 boron Inorganic materials 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
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
- C23F11/04—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
Definitions
- the present invention is directed to an inhibited aqueous sulfuric acid and a method for inhibiting corrosion by such acid.
- the present invention is based on the discovery that the corrosiveness of aqueous sulfuric acid for ferrous metals can be substantially reduced by incorporating in the acid an effective amount of boron trifluoride.
- boron trifluoride -To illustrate the effect of boron trifluoride on the corrosiveness of aqueous sulfuric acid, the following data were obtained by immersion of steel strips in the specifled acids at room temperature:
- boron trifluoride is eifective for corrosion inhibiting purposes in aqueous sulfuric acid in amounts varying from about 2% to about 30%.
- the boron trifiuoride has the additional virtue that it will not ordinarily interfere with the purposes for which the sulfuric acid is employed. especially in refinery operations.
- a method for inhibiting the corrosivity of a solution consisting of aqueous sulfuric acid having a strength no greater than 80% by weight H2804 in contact with a ferrous metal surface normally corrodible by said acid which consists in adding to said acid an amount of boron trifiuoride in the range between 2% and by weight.
- a method for inhibiting the corrosivity of a solution consisting of aqueous sulfuric acid having a strength in the range between and to H2804 in contact with a ferrous metal surface normally corrodible by said acid which consists in adding to said acid an amount of boron mfluoride in the range between 2% and 30% by weight.
Landscapes
- 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
Patented June 27, 195
METHOD OF ITING THE CORROSIVE EFFECT OF SULFURIC ACID Martin S. Baer, Baytown, Tex., assignor to Standard Oil Development Company, a corporation of Delaware N Drawing. Application November 27, 1944, Serial No. 565,401
3 Claims. (01. 23-167) The present invention is directed to an inhibited aqueous sulfuric acid and a method for inhibiting corrosion by such acid.
The present invention is based on the discovery that the corrosiveness of aqueous sulfuric acid for ferrous metals can be substantially reduced by incorporating in the acid an effective amount of boron trifluoride. -To illustrate the effect of boron trifluoride on the corrosiveness of aqueous sulfuric acid, the following data were obtained by immersion of steel strips in the specifled acids at room temperature:
Constituent:
Hrs
0a.-.. 100 76 03:804."... 100 76.2 87.3 98 I- 24 23. 8 l2. 7 2 Corrosiveness:
Peuetratlonin/yr. 0.04 0.0113 0.11 0.0006 0.0069 0.0614
This table shows that the corrosiveness to steel of 80% sulfuric acid was reduced by about 71% by the addition of 24% by weight of boron trifluoride to the acid. In like manner, the corrosiveness of 60% acid was reduced by about 94 92 by the addition thereto of 23.8% of boron trifluoride, by about 93% by the addition of 12.?
weight percent of boron trlfluoride. and by about 43% by the addition of 2 weight percent of boron trifluoride. Thus, it will be seen that the boron trifluoride is eifective for corrosion inhibiting purposes in aqueous sulfuric acid in amounts varying from about 2% to about 30%. The boron trifiuoride has the additional virtue that it will not ordinarily interfere with the purposes for which the sulfuric acid is employed. especially in refinery operations.
The nature and objects of the present invention having been thus described and illustrated. what is claimed as new and useful and is desired to be secured by Letters Patent is:
l. A method for inhibiting the corrosivity of a solution consisting of aqueous sulfuric acid having a strength no greater than 80% by weight H2804 in contact with a ferrous metal surface normally corrodible by said acid which consists in adding to said acid an amount of boron trifiuoride in the range between 2% and by weight.
2. A method for inhibiting the corrosivity of a solution consisting of aqueous sulfuric acid having a strength in the range between and to H2804 in contact with a ferrous metal surface normally corrodible by said acid which consists in adding to said acid an amount of boron mfluoride in the range between 2% and 30% by weight.
3. A method for inhibiting the corrosivity of a solution consisting of aqueous sulfuric acid having a strength in the range between 60% and 80% by weight H2504 in contact with a ferrous metal surface normally corrodible by said acid which consists in addin: to said acid an amount of boron trifiuoride in the range between 2% and 24% by weight.
S. BAER.
REFERENCES CITED UNITED STATES PATENTS Number Name Date 2.133.452 Hewlett Oct. 18. 1938 2,257.02? Vesterdel Sept. 30, 194i C' 'THER REFERENCES Mellor, Comp. Treatise in Inorganic and Them retical Chemistry, vol. 5. 1928 ed.. page 122.
Claims (1)
1. A METHOD OF INHIBITING THE CORROSIVITY OF A SOLUTION CONSISTING OF AQUEOUS SULFURIC ACID HAVING A STRENGTH NO GREATER THAN 80% BY WEIGHT H2SO4 IN CONTACT WITH A FERROUS METAL SURFACE NORMALLY CORRODIBLE BY SAID ACID WHICH CONSISTS IN ADDING TO SAID ACID AN AMOUNT OF BORON TRIFLURIDE IN THE RANGE BETWEEN 2% AND 30% BY WEIGHT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US565401A US2513131A (en) | 1944-11-27 | 1944-11-27 | Method of inhibiting the corrosive effect of sulfuric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US565401A US2513131A (en) | 1944-11-27 | 1944-11-27 | Method of inhibiting the corrosive effect of sulfuric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2513131A true US2513131A (en) | 1950-06-27 |
Family
ID=24258443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US565401A Expired - Lifetime US2513131A (en) | 1944-11-27 | 1944-11-27 | Method of inhibiting the corrosive effect of sulfuric acid |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2513131A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3415754A (en) * | 1966-02-28 | 1968-12-10 | Dow Chemical Co | Corrosion inhibitors |
| US4010240A (en) * | 1973-06-14 | 1977-03-01 | Hoechst Aktiengesellschaft | Process for the regeneration of sulfuric acid |
| US4145393A (en) * | 1976-06-19 | 1979-03-20 | Hoechst Aktiengesellschaft | Process for the protection against corrosion of cast iron in boiling concentrated sulfuric acid |
| US4629603A (en) * | 1984-12-03 | 1986-12-16 | W. R. Grace & Co. | Method of inhibiting cold end corrosion in boilers |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2133452A (en) * | 1933-12-30 | 1938-10-18 | Standard Oil Dev Co | Process for refining hydrocarbon distillate oils with boron fluoride |
| US2257627A (en) * | 1937-12-29 | 1941-09-30 | Standard Oil Dev Co | Lubricating oil |
-
1944
- 1944-11-27 US US565401A patent/US2513131A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2133452A (en) * | 1933-12-30 | 1938-10-18 | Standard Oil Dev Co | Process for refining hydrocarbon distillate oils with boron fluoride |
| US2257627A (en) * | 1937-12-29 | 1941-09-30 | Standard Oil Dev Co | Lubricating oil |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3415754A (en) * | 1966-02-28 | 1968-12-10 | Dow Chemical Co | Corrosion inhibitors |
| US4010240A (en) * | 1973-06-14 | 1977-03-01 | Hoechst Aktiengesellschaft | Process for the regeneration of sulfuric acid |
| US4145393A (en) * | 1976-06-19 | 1979-03-20 | Hoechst Aktiengesellschaft | Process for the protection against corrosion of cast iron in boiling concentrated sulfuric acid |
| US4629603A (en) * | 1984-12-03 | 1986-12-16 | W. R. Grace & Co. | Method of inhibiting cold end corrosion in boilers |
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