US20140044593A1 - Corrosion inhibitor comprising azole and cellulose nanocrystals - Google Patents
Corrosion inhibitor comprising azole and cellulose nanocrystals Download PDFInfo
- Publication number
- US20140044593A1 US20140044593A1 US13/935,483 US201313935483A US2014044593A1 US 20140044593 A1 US20140044593 A1 US 20140044593A1 US 201313935483 A US201313935483 A US 201313935483A US 2014044593 A1 US2014044593 A1 US 2014044593A1
- Authority
- US
- United States
- Prior art keywords
- azole
- cellulose nanocrystals
- corrosion inhibitor
- corrosion
- inhibiting
- 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.)
- Abandoned
Links
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000005260 corrosion Methods 0.000 title claims abstract description 58
- 230000007797 corrosion Effects 0.000 title claims abstract description 58
- 229920002678 cellulose Polymers 0.000 title claims abstract description 44
- 239000001913 cellulose Substances 0.000 title claims abstract description 44
- 239000002159 nanocrystal Substances 0.000 title claims abstract description 42
- 239000003112 inhibitor Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 125000002091 cationic group Chemical group 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910001415 sodium ion Inorganic materials 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 4
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims description 12
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 claims description 8
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 8
- 239000012964 benzotriazole Substances 0.000 claims description 8
- -1 ferrous metals Chemical class 0.000 claims description 4
- CQTXPVQGPAQNDM-UHFFFAOYSA-N 1,2-benzothiazole;indazol-3-one Chemical compound C1=CC=C2C=NSC2=C1.C1=CC=C2C(=O)N=NC2=C1 CQTXPVQGPAQNDM-UHFFFAOYSA-N 0.000 claims description 3
- XOVPZXXZORJJCG-UHFFFAOYSA-N 2-(5-ethylpyridin-2-yl)-1h-benzimidazole Chemical compound N1=CC(CC)=CC=C1C1=NC2=CC=CC=C2N1 XOVPZXXZORJJCG-UHFFFAOYSA-N 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000002173 cutting fluid Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 9
- 239000012266 salt solution Substances 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 235000002639 sodium chloride Nutrition 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 7
- 239000011780 sodium chloride Substances 0.000 description 7
- 229910001369 Brass Inorganic materials 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010951 brass Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 150000003851 azoles Chemical class 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229920001046 Nanocellulose Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910000581 Yellow brass Inorganic materials 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 125000005131 dialkylammonium group Chemical group 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000005207 tetraalkylammonium group Chemical group 0.000 description 1
- 125000005208 trialkylammonium group Chemical group 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 235000020795 whole food diet Nutrition 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
- 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
- C23F11/14—Nitrogen-containing compounds
- C23F11/149—Heterocyclic compounds containing nitrogen as hetero atom
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
- C10M145/40—Polysaccharides, e.g. cellulose
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
- C10M171/06—Particles of special shape or size
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
-
- 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
- C23F11/173—Macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/12—Polysaccharides, e.g. cellulose, biopolymers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/055—Particles related characteristics
- C10N2020/063—Fibrous forms
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/20—Metal working
- C10N2040/22—Metal working with essential removal of material, e.g. cutting, grinding or drilling
Definitions
- the present invention relates to a corrosion inhibitor.
- the invention relates to a corrosion inhibitor comprising azole and cellulose nanocrystals.
- azole compounds it is known per se to use azole compounds to inhibit corrosion.
- U.S. Pat. No. 4,134,959 to Menke et al. provides a composition and method for inhibiting corrosion.
- the composition consists essentially of an azole and a water-soluble phosphate in an effective combination to inhibit corrosion in both ferrous and non-ferrous metals.
- a corrosion inhibitor includes an azole and a plurality of cellulose nanocrystals.
- the cellulose nanocrystals are combined with monovalent cationic counterions in one embodiment.
- the monovalent cationic counterions are sodium ions according to one example.
- the cellulose nanocrystals may be in dried solid form.
- a process for the use of cellulose nanocrystals in inhibiting corrosion includes the step of providing an azole.
- the process further includes the step of adding cellulose nanocrystals to the azole.
- a process for inhibiting corrosion of metal equipment where water can reside includes adding an effective corrosion inhibiting amount of a corrosion inhibitor composition.
- the corrosion inhibitor composition includes an azole and cellulose nanocrystals.
- Cellulose nanocrystals are typically in the form of rod shaped fibrils or needles.
- the fibrils may, for example, have a length/diameter ratio of about 20 to 200, a diameter preferably less than about 60 nm, a diameter more preferably in the range of 4 nm to about 15 nm, and a length of about 150 nm to about 350 nm.
- Cellulose nanocrystals as referred to herein may alternatively be referred to as nanocrystalline cellulose (trademark), cellulose nanofibres or cellulose whiskers. Dried forms of cellulose nanocrystals may obtained via acid hydrolysis, as for example set out in International Patent Publication No.
- Cellulose nanocrystals may be purchased at CelluForce Inc., which has an office at 625 President Kennedy, Montreal, Québec, H3A 1K2.
- Corrosion rates were measured by immersing coupons of aluminum A-2024-T3 (A), yellow brass UNS C27000 (B) and carbon steel 4130 (S) in typical seawater compositions and measuring the loss of mass due to corrosion after 33 days. The coupons were left at ambient temperature and remained sealed within jars.
- Coupons A 1 , B 1 and S 1 were tested in jars containing control test salt solutions were used comprising 500 grams of water and 25 grams of sea salt, as seen in table 2.
- the sea salt used in this example was Agenco(trademark) sea salt, which may be purchased at Whole Foods Market IP. L.P., having an address at 2285 W 4th Ave, Vancouver, British Columbia, Canada. This resulted in corrosion rates for the aluminum (A 1 ), brass (B 1 ) and steel (S 1 ) coupons of 0 mills per year (mpy), 0.1 mpy and 1.2 mpy, respectively.
- Coupons A 2 , B 2 and S 2 were also tested in jars having 500 grams of water, 25 grams of sea salt and 34 grams of cellulose nanocrystals, as seen in Table 2.
- the cellulose nanocrystals used throughout the testing were in dried solid form in this example, where its proton counterion is replaced with a monovalent cationic counterion.
- the monovalent cationic counterions are sodium ions.
- the cellulose nanocrystals were thus sodium-form in this example.
- monovalent cationic counterions such as K + , Li + , NH 4 + and tetraalkylammonium (R 4 N + ), protonated trialkylammonium (HR 3 N + ), protonated dialkylammonium (H 2 RaN + ), and protonated monoalkylammonium (H 3 RN + ) ions for example.
- Coupons A 3 , B 3 , and S 3 were further tested in jars having 500 grams of water, 25 grams of sea salt and 34 grams of azole, as seen in Table 2.
- the azole used in this example was benzotriazole (BTA), a well-known inhibitor, though this is not strictly required and other azoles can be used.
- the azole can be selected from one or more of the group consisting of: tolyltriazole, benzotriazole, 1,2benzisothiazoline-3-1, 2-benzimidazolone, 4,5,6,7-tetrahydrobenzotrazole, tolylimidazolone, 2(5-ethyl-2-pyridyl)benzimidazole, and 2-mercaptobenzothiazole.
- the azole can be selected from the group consisting of tolyltriazole, benzotriazole, and 2-mercaptobenzothiazole.
- the water, salt and azole composition resulted in corrosion rates for the aluminum (A 3 ), brass (B 3 ) and steel (S 3 ) coupons of 0.1 mpy, 0.9 mpy and 0 mpy, respectively.
- the solutions containing azole thus inhibited the corrosion rates for of the coupons tested compared to the coupons A 1 , B 1 and S 1 subjected to the control salt solution.
- Coupons A 4 , B 4 , and S 4 were tested in jars having 500 grams of water, 25 grams of sea salt, 34 grams of cellulose nanocrystals and 34 grams of azole, as seen in Table 2.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Paints Or Removers (AREA)
Abstract
Description
- This application claims the benefit of provisional application No. 61/668,001 filed in the United States Patent and Trademark Office on Jul. 4, 2012, the disclosure of which is incorporated herein by reference and priority to which is claimed.
- The present invention relates to a corrosion inhibitor. In particular, the invention relates to a corrosion inhibitor comprising azole and cellulose nanocrystals.
- It is known per se to use azole compounds to inhibit corrosion. For example, U.S. Pat. No. 4,134,959 to Menke et al. provides a composition and method for inhibiting corrosion. The composition consists essentially of an azole and a water-soluble phosphate in an effective combination to inhibit corrosion in both ferrous and non-ferrous metals.
- However, azole compounds are relatively expensive. There is accordingly a need for an effective corrosion inhibitor that is less costly.
- It is an object of the present invention to provide, and the present invention discloses herein, an improved corrosion inhibitor that overcomes the above disadvantages.
- According to one aspect, there is provided a corrosion inhibitor. The corrosion includes an azole and a plurality of cellulose nanocrystals.
- The cellulose nanocrystals are combined with monovalent cationic counterions in one embodiment. The monovalent cationic counterions are sodium ions according to one example. The cellulose nanocrystals may be in dried solid form.
- According to a further aspect, there is provided a process for the use of cellulose nanocrystals in inhibiting corrosion. The process includes the step of providing an azole. The process further includes the step of adding cellulose nanocrystals to the azole.
- According to another aspect, there is provided a process for inhibiting corrosion of metal equipment where water can reside. The process includes adding an effective corrosion inhibiting amount of a corrosion inhibitor composition. The corrosion inhibitor composition includes an azole and cellulose nanocrystals.
- Cellulose nanocrystals are typically in the form of rod shaped fibrils or needles. The fibrils may, for example, have a length/diameter ratio of about 20 to 200, a diameter preferably less than about 60 nm, a diameter more preferably in the range of 4 nm to about 15 nm, and a length of about 150 nm to about 350 nm. Cellulose nanocrystals as referred to herein may alternatively be referred to as nanocrystalline cellulose (trademark), cellulose nanofibres or cellulose whiskers. Dried forms of cellulose nanocrystals may obtained via acid hydrolysis, as for example set out in International Patent Publication No. WO 2010/066036 A1 to Beck et al, the disclosure of which is incorporated herein by reference. Cellulose nanocrystals may be purchased at CelluForce Inc., which has an office at 625 President Kennedy, Montreal, Québec, H3A 1K2.
- A series of corrosion tests were performed the results of which are shown in Table 1 set out below.
-
TABLE 1 Coupon Weight Loss in mills per year (mpy) Salt Solution with Salt Solution with Azole and Cellulose Cellulose Nanocrystals Nanocrystals Salt Solution (dried-form, Na-CNC) Salt Solution (dried-form, Na-CNC) (control) added to the solution with Azole added to the solution Aluminium A1 = 0 mpy A2 = 0.4 mpy A3 = 0.1 mpy A4 = 0 mpy Coupons (A) Brass B1 = 0.1 mpy B2 = 0.2 mpy B3 = 0 mpy B4 = 0 mpy Coupons (B) Steel S1 = 1.2 mpy S2 = 1.7 mpy S3 = 0.9 mpy S4 = 0.6 mpy Coupons (S) - Corrosion rates were measured by immersing coupons of aluminum A-2024-T3 (A), yellow brass UNS C27000 (B) and carbon steel 4130 (S) in typical seawater compositions and measuring the loss of mass due to corrosion after 33 days. The coupons were left at ambient temperature and remained sealed within jars.
- The mass of each coupon was determined before and after the 33 day period to an accuracy of ±10−5 grams. Mils per year (mpy) rates were obtained thereby following the protocol outlined in the NACE International Corrosion Engineers Reference Book, 2nd Edition, at set out on pages 78 and 79 therein. This book may be obtained at NACE International, which has an address at 1440 South Creek Drive, Houston, Tex., 7084-4906, USA.
- Coupons A1, B1 and S1 were tested in jars containing control test salt solutions were used comprising 500 grams of water and 25 grams of sea salt, as seen in table 2. The sea salt used in this example was Agenco(trademark) sea salt, which may be purchased at Whole Foods Market IP. L.P., having an address at 2285 W 4th Ave, Vancouver, British Columbia, Canada. This resulted in corrosion rates for the aluminum (A1), brass (B1) and steel (S1) coupons of 0 mills per year (mpy), 0.1 mpy and 1.2 mpy, respectively.
-
TABLE 2 Mass of Chemicals in Formulation (grams) Cellulose Water Sea Salt Nanocrystals Azole (grams) (grams) (grams) (grams) Salt Solution 500 25 0 0 (Coupons A1, B1, and S1) Salt Solution with 500 25 34 0 Cellulose Nanocrystals (dried-form, Na-CNC) added to the solution (Coupons A2, B2 and S2) Salt Solution with Azole 500 25 0 34 (Coupons A3, B3 and S3) Salt Solution with Azole 500 25 34 34 and Cellulose Nanocrystals (dried-form, Na-CNC) added to the solution (Coupons A4, B4 and S4) - Coupons A2, B2 and S2 were also tested in jars having 500 grams of water, 25 grams of sea salt and 34 grams of cellulose nanocrystals, as seen in Table 2. The cellulose nanocrystals used throughout the testing were in dried solid form in this example, where its proton counterion is replaced with a monovalent cationic counterion. In this example, the monovalent cationic counterions are sodium ions. The cellulose nanocrystals were thus sodium-form in this example. However, other forms of monovalent cationic counterions may be used, such as K+, Li+, NH4 + and tetraalkylammonium (R4N+), protonated trialkylammonium (HR3N+), protonated dialkylammonium (H2RaN+), and protonated monoalkylammonium (H3RN+) ions for example.
- This resulted in corrosion rates for the aluminum (A2), brass (B2) and steel (S2) coupons of 0.4 mpy, 0.2 mpy and 1.7 mpy, respectively. In other words, the cellulose nanocrystals increased corrosion rates for each of the coupons tested.
- Coupons A3, B3, and S3 were further tested in jars having 500 grams of water, 25 grams of sea salt and 34 grams of azole, as seen in Table 2. The azole used in this example was benzotriazole (BTA), a well-known inhibitor, though this is not strictly required and other azoles can be used. For example, the azole can be selected from one or more of the group consisting of: tolyltriazole, benzotriazole, 1,2benzisothiazoline-3-1, 2-benzimidazolone, 4,5,6,7-tetrahydrobenzotrazole, tolylimidazolone, 2(5-ethyl-2-pyridyl)benzimidazole, and 2-mercaptobenzothiazole. According to one preferred aspect, the azole can be selected from the group consisting of tolyltriazole, benzotriazole, and 2-mercaptobenzothiazole. The water, salt and azole composition resulted in corrosion rates for the aluminum (A3), brass (B3) and steel (S3) coupons of 0.1 mpy, 0.9 mpy and 0 mpy, respectively. In all but the case for the aluminium coupon A3, the solutions containing azole thus inhibited the corrosion rates for of the coupons tested compared to the coupons A1, B1 and S1 subjected to the control salt solution.
- Coupons A4, B4, and S4 were tested in jars having 500 grams of water, 25 grams of sea salt, 34 grams of cellulose nanocrystals and 34 grams of azole, as seen in Table 2.
- Unexpectedly, this resulted in corrosion rates for the aluminum (A4), brass (B4) and steel (S4) coupons of 0 mpy, 0.6 mpy and 0 mpy, respectively. It can thus be seen in that compared to azole alone, a combination of azole and cellulose nanocrystals provides a synergistic improvement in corrosion inhibition. The corrosion rate of the aluminium coupon was lowered, the corrosion rate of the brass remained at zero, and the corrosion rate of the steel went down by 30 percent. It has thus been discovered that combining azole compounds with cellulose nanocrystals provides a synergistic effect in inhibiting corrosion for ferrous and non-ferrous metals. This may therefore reduce the amount of azole and/or cellulose nanocrystals required to effectively inhibit corrosion.
- It will be understood by someone skilled in the art that many of the details provided above are by way of example only and are not intended to limit the scope of the invention which is to be determined with reference to at least the following claims.
Claims (20)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/935,483 US20140044593A1 (en) | 2012-07-04 | 2013-07-04 | Corrosion inhibitor comprising azole and cellulose nanocrystals |
US14/150,749 US9222174B2 (en) | 2013-07-03 | 2014-01-08 | Corrosion inhibitor comprising cellulose nanocrystals and cellulose nanocrystals in combination with a corrosion inhibitor |
CA2954005A CA2954005A1 (en) | 2013-07-03 | 2014-07-03 | Use of charged cellulose nanocrystals for corrosion inhibition and a corrosion inhibiting composition comprising the same |
PCT/CA2014/000544 WO2015000063A1 (en) | 2013-07-03 | 2014-07-03 | Use of charged cellulose nanocrystals for corrosion inhibition and a corrosion inhibiting composition comprising the same |
US14/974,294 US9359678B2 (en) | 2012-07-04 | 2015-12-18 | Use of charged cellulose nanocrystals for corrosion inhibition and a corrosion inhibiting composition comprising the same |
US15/174,903 US20160362560A1 (en) | 2012-07-04 | 2016-06-06 | Use of charged cellulose nanocrystals for corrosion inhibition and a corrosion inhibiting composition comprising the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201261668001P | 2012-07-04 | 2012-07-04 | |
US13/935,483 US20140044593A1 (en) | 2012-07-04 | 2013-07-04 | Corrosion inhibitor comprising azole and cellulose nanocrystals |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/935,477 Continuation-In-Part US20140011722A1 (en) | 2012-07-04 | 2013-07-03 | Use of cellulose nanocrystals as a corrosion inhibitor |
Related Child Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13935477 Continuation-In-Part | 2012-07-03 | ||
US13/935,477 Continuation-In-Part US20140011722A1 (en) | 2012-07-04 | 2013-07-03 | Use of cellulose nanocrystals as a corrosion inhibitor |
US14/150,749 Continuation-In-Part US9222174B2 (en) | 2012-07-04 | 2014-01-08 | Corrosion inhibitor comprising cellulose nanocrystals and cellulose nanocrystals in combination with a corrosion inhibitor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140044593A1 true US20140044593A1 (en) | 2014-02-13 |
Family
ID=49878965
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/935,477 Abandoned US20140011722A1 (en) | 2012-07-04 | 2013-07-03 | Use of cellulose nanocrystals as a corrosion inhibitor |
US13/935,483 Abandoned US20140044593A1 (en) | 2012-07-04 | 2013-07-04 | Corrosion inhibitor comprising azole and cellulose nanocrystals |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/935,477 Abandoned US20140011722A1 (en) | 2012-07-04 | 2013-07-03 | Use of cellulose nanocrystals as a corrosion inhibitor |
Country Status (1)
Country | Link |
---|---|
US (2) | US20140011722A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150368561A1 (en) * | 2013-02-06 | 2015-12-24 | X'aan Innovations Inc. | Ammonium polyphosphate based fire-retardant compositions |
WO2016191672A1 (en) | 2015-05-28 | 2016-12-01 | Ecolab Usa Inc. | 2-substituted imidazole and benzimidazole corrosion inhibitors |
US10190222B2 (en) | 2015-05-28 | 2019-01-29 | Ecolab Usa Inc. | Corrosion inhibitors |
US10519116B2 (en) | 2015-05-28 | 2019-12-31 | Ecolab Usa Inc. | Water-soluble pyrazole derivatives as corrosion inhibitors |
US10669637B2 (en) | 2015-05-28 | 2020-06-02 | Ecolab Usa Inc. | Purine-based corrosion inhibitors |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016175258A1 (en) * | 2015-04-30 | 2016-11-03 | 出光興産株式会社 | Grease, mechanical component, and method for producing grease |
FR3040641B1 (en) * | 2015-09-07 | 2020-05-08 | Nof Metal Coatings Europe | METHOD FOR APPLYING AN ANTI-CORROSION COATING ON A METAL PART, AN AQUEOUS COATING COMPOSITION, AN ANTI-CORROSION COATING OF METAL PARTS AND A COATED METAL PART |
US10793699B2 (en) | 2017-02-22 | 2020-10-06 | Alliance For Sustainable Energy, Llc | Cellulose-based composites and methods of making the same |
JP7075737B2 (en) * | 2017-09-27 | 2022-05-26 | 株式会社日進製作所 | Power-generating working fluid |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4536302A (en) * | 1983-06-30 | 1985-08-20 | Nl Industries Inc | Corrosion inhibition of aqueous brines |
US6585933B1 (en) * | 1999-05-03 | 2003-07-01 | Betzdearborn, Inc. | Method and composition for inhibiting corrosion in aqueous systems |
US20070196975A1 (en) * | 2004-04-12 | 2007-08-23 | Hitachi Chemical Co., Ltd. | Metal-Polishing Liquid And Polishing Method Using The Same |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MX2011011553A (en) * | 2009-05-01 | 2011-11-29 | Fpinnovations | Control of nanocrystalline cellulose film iridescence wavelength. |
-
2013
- 2013-07-03 US US13/935,477 patent/US20140011722A1/en not_active Abandoned
- 2013-07-04 US US13/935,483 patent/US20140044593A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4536302A (en) * | 1983-06-30 | 1985-08-20 | Nl Industries Inc | Corrosion inhibition of aqueous brines |
US6585933B1 (en) * | 1999-05-03 | 2003-07-01 | Betzdearborn, Inc. | Method and composition for inhibiting corrosion in aqueous systems |
US20070196975A1 (en) * | 2004-04-12 | 2007-08-23 | Hitachi Chemical Co., Ltd. | Metal-Polishing Liquid And Polishing Method Using The Same |
Non-Patent Citations (1)
Title |
---|
Modiya et al. Synthesis and screening of antibacterial and antifungal activity of 5-chloro-1,3-benzoazol-2(3 h)-one derivatives. Organic and Medicinal Chemistry Letters 2012, 2:29 * |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9926491B2 (en) * | 2013-02-06 | 2018-03-27 | X'aan Innovations Inc. | Ammonium polyphosphate based fire-retardant compositions |
US20150368561A1 (en) * | 2013-02-06 | 2015-12-24 | X'aan Innovations Inc. | Ammonium polyphosphate based fire-retardant compositions |
US10202694B2 (en) | 2015-05-28 | 2019-02-12 | Ecolab Usa Inc. | 2-substituted imidazole and benzimidazole corrosion inhibitors |
CN107787380A (en) * | 2015-05-28 | 2018-03-09 | 艺康美国股份有限公司 | The imidazoles and benzimidazole corrosion inhibitor of 2 substitutions |
EP3303654A4 (en) * | 2015-05-28 | 2019-01-02 | Ecolab Usa Inc. | 2-substituted imidazole and benzimidazole corrosion inhibitors |
US10190222B2 (en) | 2015-05-28 | 2019-01-29 | Ecolab Usa Inc. | Corrosion inhibitors |
WO2016191672A1 (en) | 2015-05-28 | 2016-12-01 | Ecolab Usa Inc. | 2-substituted imidazole and benzimidazole corrosion inhibitors |
US10519116B2 (en) | 2015-05-28 | 2019-12-31 | Ecolab Usa Inc. | Water-soluble pyrazole derivatives as corrosion inhibitors |
US10669637B2 (en) | 2015-05-28 | 2020-06-02 | Ecolab Usa Inc. | Purine-based corrosion inhibitors |
CN107787380B (en) * | 2015-05-28 | 2020-10-30 | 艺康美国股份有限公司 | 2-substituted imidazole and benzimidazole corrosion inhibitors |
JP2021091974A (en) * | 2015-05-28 | 2021-06-17 | エコラボ ユーエスエー インコーポレイティド | 2-Substituted imidazole and benzimidazole corrosion inhibitors |
JP7053914B2 (en) | 2015-05-28 | 2022-04-12 | エコラボ ユーエスエー インコーポレイティド | 2-Substituted imidazole and benzimidazole corrosion inhibitors |
AU2016267606B2 (en) * | 2015-05-28 | 2022-04-14 | Ecolab Usa Inc. | 2-substituted imidazole and benzimidazole corrosion inhibitors |
US11306400B2 (en) | 2015-05-28 | 2022-04-19 | Ecolab Usa Inc. | 2-substituted imidazole and benzimidazole corrosion inhibitors |
Also Published As
Publication number | Publication date |
---|---|
US20140011722A1 (en) | 2014-01-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20140044593A1 (en) | Corrosion inhibitor comprising azole and cellulose nanocrystals | |
Umoren et al. | Effect of halide ions on the corrosion inhibition efficiency of different organic species–A review | |
EP0880566B1 (en) | Use of quaternized imidazoles as nonferrous metal corrosion inhibitors and antifreeze concentrates and coolant compositions containing said corrosion inhibitors | |
JP3258133B2 (en) | Corrosion inhibitor for heat transfer fluid | |
WO2001032801A1 (en) | Antifreeze concentrates on the basis of dicarboxylic acids, molybdate and triazoles or thiazoles and coolant compositions containing these concentrates | |
PT865474E (en) | CORROSION INHIBITORS BASED ON NEOACIDES | |
A Negm et al. | Impact of synthesized and natural compounds in corrosion inhibition of carbon steel and aluminium in acidic media | |
US5849220A (en) | Corrosion inhibitor | |
CN103352226B (en) | A kind of inhibiter for preventing brass ware from corroding | |
AU2017249052A1 (en) | Composition and method for inhibiting corrosion | |
Souza et al. | Ionic liquids as corrosion inhibitors for carbon steel protection in hydrochloric acid solution: A first review | |
AU2016267614B2 (en) | Purine-based corrosion inhibitors | |
US6200529B1 (en) | Corrosion inhibition method suitable for use in potable water | |
US9222174B2 (en) | Corrosion inhibitor comprising cellulose nanocrystals and cellulose nanocrystals in combination with a corrosion inhibitor | |
US20160362560A1 (en) | Use of charged cellulose nanocrystals for corrosion inhibition and a corrosion inhibiting composition comprising the same | |
US9359678B2 (en) | Use of charged cellulose nanocrystals for corrosion inhibition and a corrosion inhibiting composition comprising the same | |
WO2000002974A1 (en) | Antifreeze concentrates and coolant compositions containing these concentrates for cooling circuits in internal combustion engines | |
WO2003054108A1 (en) | Radiator protective agent concentrates and coolant compositions having an improved protection against corrosion | |
JP2011214064A (en) | Pitting-corrosion retarder and method for retarding pitting corrosion | |
Okeke et al. | Corrosion inhibition efficacy of Cninodosculus chayamansa extracts on aluminum metal in acidic and alkaline media | |
Solomon | Synergistic corrosion inhibition effect of metal cations | |
KR101430043B1 (en) | Equipment-protective compound of a closed heat-system | |
KR100299326B1 (en) | Organic acid-based antifreeze composition | |
RU2358037C1 (en) | Corrosion inhibitor | |
CN102127767A (en) | Composite corrosion inhibitor for inhibiting carbon steel corrosion in acetic acid solution and application thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NANOBLOC TECHNOLOGY INC., CANADA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GARNER, ANDREW;REEL/FRAME:032772/0897 Effective date: 20140428 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: NANOHIBITOR TECHNOLOGY INC., CANADA Free format text: CHANGE OF NAME;ASSIGNOR:NANOBLOC TECHNOLOGY INC.;REEL/FRAME:035061/0152 Effective date: 20150217 |
|
AS | Assignment |
Owner name: X'AAN INNOVATIONS INC., CANADA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GARNER, ANDREW;NANOHIBITOR TECHNOLOGY INC;REEL/FRAME:045649/0866 Effective date: 20180409 |