US3050360A - Method of inhibiting corrosion of iron and steel - Google Patents
Method of inhibiting corrosion of iron and steel Download PDFInfo
- Publication number
- US3050360A US3050360A US56669A US5666960A US3050360A US 3050360 A US3050360 A US 3050360A US 56669 A US56669 A US 56669A US 5666960 A US5666960 A US 5666960A US 3050360 A US3050360 A US 3050360A
- Authority
- US
- United States
- Prior art keywords
- weight
- water
- steel
- corrosion
- iron
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title description 16
- 238000005260 corrosion Methods 0.000 title description 16
- 230000007797 corrosion Effects 0.000 title description 16
- 229910000831 Steel Inorganic materials 0.000 title description 9
- 238000000034 method Methods 0.000 title description 9
- 239000010959 steel Substances 0.000 title description 9
- 230000002401 inhibitory effect Effects 0.000 title description 8
- 229910052742 iron Inorganic materials 0.000 title description 8
- 239000000243 solution Substances 0.000 description 21
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 12
- -1 chlorine ions Chemical class 0.000 description 10
- 239000003112 inhibitor Substances 0.000 description 10
- 239000013535 sea water Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 229910052783 alkali metal Inorganic materials 0.000 description 8
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical group [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 4
- 239000011149 active material Substances 0.000 description 4
- 239000001632 sodium acetate Substances 0.000 description 4
- 235000017281 sodium acetate Nutrition 0.000 description 4
- 235000010288 sodium nitrite Nutrition 0.000 description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000003209 petroleum derivative Substances 0.000 description 3
- RAFRTSDUWORDLA-UHFFFAOYSA-N phenyl 3-chloropropanoate Chemical compound ClCCC(=O)OC1=CC=CC=C1 RAFRTSDUWORDLA-UHFFFAOYSA-N 0.000 description 3
- 229960004418 trolamine Drugs 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 241000257303 Hymenoptera Species 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000000276 potassium ferrocyanide Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- XOGGUFAVLNCTRS-UHFFFAOYSA-N tetrapotassium;iron(2+);hexacyanide Chemical compound [K+].[K+].[K+].[K+].[Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] XOGGUFAVLNCTRS-UHFFFAOYSA-N 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
- C23F11/08—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
-
- 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
- C23F11/02—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in air or gases by adding vapour phase inhibitors
Definitions
- the invention relates to the inhibition that is to say the prevention or reduction, of the corrosion of iron and steel, especially the corrosion of iron and steel which comes into contact either continuously or intermittently with water containing chlorine ions.
- iron and steel is to be understood to include alloys of iron.
- the invention is particularly important with respect to the metal surface of cargo tanks in marinetankers.
- the walls of the tanks are almost continually exposed to corrosive influences. Petroleum or petroleum products transported by these tankers may cause corrosion on account of the great solubility of oxygen in these products and the small amount of water which is usually present in such a cargo.
- Serious corrosion is also caused by the periodical cleaning of the tanks which, in order to save time, is usually done at sea and consequently with sea-water.
- sea-water is often heated to 80 C. to 90 C. and then sprayed until pressure against the walls in order to remove as much rust as possible together with the oil residues.
- the tank is empty the walls are corroded by the atmosphere, especially at sea.
- inhibitors When treating the Walls of the cargo tanks with corrosion-inhibiting materials, known as inhibitors, great care should be exercised in the choiceof the inhibitor. These materials cause turbidity or haze in the oil products transported even when present in small concentrations, as they promote the emulsification of water in the oil phase. Other inhibitors are soluble in oil and this is also undesirable. Moreover, it has been found that the effect of many proposed inhibitors is insufficient for the present purpose.
- the maximum effect is obtained by means of a solution containing 4-6 parts by weight of alkali metal nitrite or calcium nitrite to 3-5" parts by weight of alkali metal acetate to 34 parts by weight of alkanolamine. Outside the extreme limits specified there is a marked reduction in the corrosion-inhibiting effect.
- the preferred alkali metal nitrite used is sodium nitrite and the preferred alkali metal acetate is sodium acetate, while the prefererd alkanolamine is trior di-ethanolamine or a mixture of water-soluble alkanolamines.
- the surfaces to be protected may be treated with the above solutions according to any technique known in the art. Fairly large surfaces, for example, the walls of the cargo tanks in tankers may be sprayed with the solution. This treatment may be carried out at normal temperature, i.e. the ambient temperature, but if desired, also at elevated temperature, for example, 40 C.50 C. No other substances, for example, various phosphates, which are found in inhibitor solutions need be incorporated in the solution. The presence of chlorine ions in the solution does not neutralize the corrosion-inhibiting effect.
- the sand-blasted strips were immersed in synthetic sea-water for four half-hourly intervals spread over one day during two days. They were then suspended above synthetic sea-water for two days and then treated in the following way:
- 29th day as for 1st day, etc.
- treatment schedule is as follows:
- the method according to the invention has a number of considerable advantages over the methods of treatment of iron and steel with corrosion-inhibiting materials which have hitherto been known.
- the present inhibitor is comparatively inexpensive and owing to the good solubility concentrated. solutions may be prepared which is advantageous in connection with transport and storage.
- the solubility at low temperature is excellent so that there is scarcely any risk of crystallization.
- the solubility in hydrocarbons is also extremely low.
- the inhibitor has not been found to have any effect on the fuel properties of the fuel transported in treated cargo tanks.
- a corrosion inhibiting process for ferrous metal cargo compartments of a sea-going oil tanker which comprises: coating the metal inner surface of said compartment containing residual amounts of refined petroleum products with an aqueous concentrate containing 3-7 parts by weight of sodium nitrite, 2-6 parts by weight sodium acetate and 2-5 parts by weight of tri-ethanolamine and the balance to make parts by weight being water, said concentrate being diluted with water to give a total active material concentration in final dilution of in excess of about 5.4% by weight and said final aqueous composition being coated on said metal surface.
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)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL245796 | 1959-11-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3050360A true US3050360A (en) | 1962-08-21 |
Family
ID=19752053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US56669A Expired - Lifetime US3050360A (en) | 1959-11-26 | 1960-09-19 | Method of inhibiting corrosion of iron and steel |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3050360A (en)) |
| BE (1) | BE597460A (en)) |
| DE (1) | DE1185450B (en)) |
| GB (1) | GB888682A (en)) |
| NL (1) | NL245796A (en)) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3507795A (en) * | 1966-12-09 | 1970-04-21 | Amchem Prod | Composition for removal of copper and copper oxide scales from boilers |
| US4017450A (en) * | 1976-03-29 | 1977-04-12 | Phillips Petroleum Company | Inhibition of poly(arylene sulfide) resin induced metal corrosion |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2180427A (en) * | 1936-09-19 | 1939-11-21 | Celanese Corp | Corrosion prevention |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2715605A (en) * | 1952-07-02 | 1955-08-16 | Jefferson Chem Co Inc | Prevention of corrosion of ferrous metals by alkanolamines |
-
0
- NL NL245796D patent/NL245796A/xx unknown
- BE BE597460D patent/BE597460A/xx unknown
-
1960
- 1960-09-19 US US56669A patent/US3050360A/en not_active Expired - Lifetime
- 1960-11-24 DE DES71406A patent/DE1185450B/de active Pending
- 1960-11-24 GB GB40424/60A patent/GB888682A/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2180427A (en) * | 1936-09-19 | 1939-11-21 | Celanese Corp | Corrosion prevention |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3507795A (en) * | 1966-12-09 | 1970-04-21 | Amchem Prod | Composition for removal of copper and copper oxide scales from boilers |
| US4017450A (en) * | 1976-03-29 | 1977-04-12 | Phillips Petroleum Company | Inhibition of poly(arylene sulfide) resin induced metal corrosion |
Also Published As
| Publication number | Publication date |
|---|---|
| GB888682A (en) | 1962-01-31 |
| DE1185450B (de) | 1965-01-14 |
| BE597460A (en)) | |
| NL245796A (en)) |
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