CA1144144A - Metal working coolant and lubricant composition containing triazole and thiadiazole compounds and use thereof - Google Patents
Metal working coolant and lubricant composition containing triazole and thiadiazole compounds and use thereofInfo
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- CA1144144A CA1144144A CA000380346A CA380346A CA1144144A CA 1144144 A CA1144144 A CA 1144144A CA 000380346 A CA000380346 A CA 000380346A CA 380346 A CA380346 A CA 380346A CA 1144144 A CA1144144 A CA 1144144A
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Abstract
METAL WORKING COOLANT AND LUBRICANT COMPOSITION
CONTAINING TRIAZOLE AND THIADIAZOLE COMPOUNDS
AND USE THEREOF
ABSTRACT OF THE DISCLOSURE
Metal-working compositions (water-base, oil-base and oil-in-water emulsions) containing triazole and thiadiazole compounds are disclosed. These compositions prolong the working life of metal cutting and grinding tools containing tungsten carbide particles bonded together by nickel or cobalt. The oil-base coolant and lubricant comprises a mineral oil, a triazole or thiadiazole compound, and optionally, an extreme pressure lubri-cant, fats, rust preventives and mist suppressants. The aqueous base and oil-in-water emulsion metal-working compositions are prepared in the form of a liquid concentrate which subsequently is diluted with water to form the metal-working coolant or lubri-cant. The concentrate to be diluted and made into an aqueous coolant and lubricant comprises a triazole and thiadiazole com-pound, boric acid, an amine or mixture of amines, sodium gluconate and an aromatic or paraffinic carboxylic acid. Optionally a wetting agent, bactericide, fungicide, extreme pressure agent and an antifoaming agent can also be added to the formulation. The concentrate to be diluted to form an oil-in-water emulsion lubri-cant and coolant comprises mineral oil, a triazole or thiadiazole land emulsifiers. Optionally, there may also be added bactericides, extreme pressure agents and antifoaming agents.
CONTAINING TRIAZOLE AND THIADIAZOLE COMPOUNDS
AND USE THEREOF
ABSTRACT OF THE DISCLOSURE
Metal-working compositions (water-base, oil-base and oil-in-water emulsions) containing triazole and thiadiazole compounds are disclosed. These compositions prolong the working life of metal cutting and grinding tools containing tungsten carbide particles bonded together by nickel or cobalt. The oil-base coolant and lubricant comprises a mineral oil, a triazole or thiadiazole compound, and optionally, an extreme pressure lubri-cant, fats, rust preventives and mist suppressants. The aqueous base and oil-in-water emulsion metal-working compositions are prepared in the form of a liquid concentrate which subsequently is diluted with water to form the metal-working coolant or lubri-cant. The concentrate to be diluted and made into an aqueous coolant and lubricant comprises a triazole and thiadiazole com-pound, boric acid, an amine or mixture of amines, sodium gluconate and an aromatic or paraffinic carboxylic acid. Optionally a wetting agent, bactericide, fungicide, extreme pressure agent and an antifoaming agent can also be added to the formulation. The concentrate to be diluted to form an oil-in-water emulsion lubri-cant and coolant comprises mineral oil, a triazole or thiadiazole land emulsifiers. Optionally, there may also be added bactericides, extreme pressure agents and antifoaming agents.
Description
ll 1144:~44 NATURE OF THE INVENTION
¦' This invention relates to corrosion inhibitors for cobalt and nickel in the metallic form. More specifically this invention ~¦relates to water-base, oil-base, and oil-in-water emulsion lubri-~ !
................... .
1 ~44~44 icant and coolant compositions, used in the drilling, cutting and~¦l illing and other metal working operations.
Il BACKGROUND OF THE INVENTION
Il A large percentage of industrial cutting tools used to~
j,drill, cut, grind, and mill metals are made of tungsten carbide particles held together by a cobalt bonding agent. In a few instances the bonding agent may be nickel or platinum. The drilling, cutting, milling, or other metal working step requires the application of a liquid coolant or lubricant at the area of contact between the metal surface being machined and the drilling, cutting or milling tool. Although water or mineral oil can be ~used alone as a coolant or lubricant the practice has been to add icompounds which increa,e the lubricity and cooling ability of the liquid and which dela, ts deterioration. These added compounds ,often, however, contain sequestering (chelating) agents and lmoities such as sulfur, chlorine, carboxyl groups and hydroxyl ¦'ions. It has been observed that when cutting, drilling or milling lltools which are made up of tungsten carbide particles bonded with j ilcobalt or nickel metal are exposed to these cutting fluids contain-ing chelating agents or moities such as sulfur, chlorine, carboxyl¦Igroups and hydroxyl ions, the cobalt or nickel is leached away.
Leaching of the cobalt or nickel matrix from the tool leaves a residue of carbide particles and results in premature failure of lthe tool. The presence of sequesterants or moities in the coolant lor lubricant, as well as the mere presence of hydrogen and hydroxyl ions in a water-base cutting fluid, are thought to be responsible for the leaching of cobalt (or nickel). An object of this inven-tion, therefore, is to reduce the corrosion of cobalt and nickel 1, , -2-4~44 surfaces. Another object of this invention is to prevent or reduce the rate of leaching of cobalt and nickel binder from Imachining tools made up of abrasive particles such as tungsten ¦~arbide and a binder material such as cobalt or nickel.
5 ¦1 Another object of this lnvention is to prevent or reduce the ~orrosion or oxidation of aluminum alloys during the said machining action when wat~r-base coolants and lubricants are used.
. ~ SUMMARY OF THE INVENTION
, I
Briefly stated this invention comprises contacting with a solution of a triazole or thiadiazole compound a cobalt or nickel surface exposed to leaching action by a liquid agent. Ordinarily ~, ~the triazole or thiadiazole compound will be contained in the ',liquid leaching agent. In another aspect this invention comprises !a concentrate for preparing an aqueous base, oil base or oil-in-Iwater emulsion lubricant and coolant composition containingtherein a triazole or thiadiazole or mixtures thereof. In still another aspect this invention comprises the coolant and lubricant composition made by diluting the concentrate with oil or water.
!'In still another aspect this ihvention comprises the method of ¦¦drilling, grinding, cutting or otherwise working a metal utilizing llthe coolant and lubricant composition described above. The utility ¦!of the water-base concentrate and water-base coolant composition ~s further enhanced by the addition of 1 to 4 parts of sodium . ~luconate. Specifically when aluminum is being machined the Isodium gluconate prev~nts corrosion.
DE~AI~ED DESCRIPTION OF THE INVENTION
The triazole compounds utilized in this invention have the ;generic formula:
Il 1144144 ¦~here R is hydrogen or a methyl substituent. If R is hydrogen ¦the compound is benzene triazole and if R is a methyl radical llthen the compound is tolyl triazole.
¦¦ The thiadiazole compounds utilized in this invention can jhave the generic formula:
R ~
here R' is a hydrogen or a methyl substituent. When Rlis hydrogen then the compound is 2,1,3-benzothiadiazole. Other thiadiazole compounds which can be utilized are 2,5-dimercapto-ll1,3,4-thiadiazole having the structural formula:
N ~ N
HS -C ~ C -SH
!the disodium salt thereof, disodium 2,5-dimercaptothiadiazole ,having the formula:
,! N N
I' NaS -C~ f -S~a !~and di-(triethanolammonium) dimercaptothiadiazole.
i In the following description all compositions are described in parts by weight unless specified otherwise.
¦ OIL BASE LIQUID
COOLANT AND LUBRICANT COMPOSITION
The oil-base working-composition comprises between 80 and 95 parts of mineral oil; and between l and 5 parts of one of the itriazole or dithiazole compounds shown above or mixtures thereof.
,~Optionally other additives can be added such as between l and 10 lparts of an extreme pressure lubricant, between 1 and 5 parts of llrust preventive and between 1 and 5 parts of mist suppressant.
¦,These additives are known to those skilled in the art and are i i:l44144 readily available in commerce. In the oil-base lubricant composi-tion made therefrom the preferred triazole compound is benzyltria-~zole and the preferred thiadiazole compound is 2,1,3-benzothiadia-I!zole.
1~ A suitable extreme pressure lubricant is Klora 6001 manufac-itured by Kiel Chemical. A suitable rust preventive is Tectyl 477 anufactured by Valvoline International and a suitable mist . ¦suppressant is manufactured by Exxon Corporation. When these 'optional compounds are added, the triazole and thiadiazole ,compounds are most effective since the introduction of these materials also bring into the lubricant composition those agents thought to be responsible for the leaching of cobalt and nickel 'from cutting and grinding tools.
. . ~
I; i 15 l~ COOLANT AND LUBRICANT COMPOSITIONS
'!' i The concentrate which is to be subsequently diluted with ~ater to form an oil-in-water emulsion coolant and lubricant ~comprises between 60 and 80 parts of mineral oil; between l and j5 parts of one of the triazole or thiadiazole compounds above or mixtures thereof; and between 15 and 25 parts of an emulsifier.
Optionally there may also be added between l and 2 parts of a ¦bactericide, between 3 and 10 parts of an extreme pressure lubri-~cant and between l and 3 parts of an antifoaming agent. The ilubricant and coolant composition is prepared by diluting the ~above-described composition with water until the concentration of ¦Itriazole or thiadiazole is between about 2S0 and about 2000 parts per million. For these oil-in-water emulsion compounds the preferred triazole is benzyltriazole and the preferred thiadiazole 'is 2,5-dimercapto-1,3,4-thiadiazole.
3G !! A suitable emulsifier is sodium sulfate, a suitable bacteri-i!cide is Bioban P 1487; a suitable extreme pressure lubricant is ~loro 6001 and a suitable antifoaming agent is Nopco NDW available from Diamond Shamrock Corporation.
1 ~ ~r~z~, e n~\~r~ 5 Il 1144144 . !
WATER-BASE CONCENTRATES AND WATER-BASE COOLANT
AND LUBRICANT COMPOSITIONS
The concentrate which is to be subsequently diluted with ~water to form a water-base coolant and lubricant comprises between ~60 and ~0 parts of water; be.tween 3 and 10 parts of a triazole or l¦thiadlazole or mixtures thereof; between 2 and 8 parts of an ¦!aromatic or paraffinic carboxylic acid; between 2 and 10 parts of ¦~oric acid; and between 5 an~ 20 parts of an amine or mixture of ~amines that will react with the carboxylic acid component of the composition. Optionally there may be added between .l and 5 parts ;of a wetting agent; between 1 and 2 parts of a bactericide and ~fungicide; and between l and 2 parts of an antifoaming agent. The triazole and thiadiazole compounds are particularly effective ''against the leaching of cobalt and nickel when these optional Iadditives are included since they bring into the system those ~oities which contribute to leaching. In this water-base concen- ¦
'!trate and the water-base lubricant made by adding water to the lconcentrate the preferred triazole compound is tolyltriazole and lthe preferred dithiazole compound is the sodium salt of 2,5-!Idimercaptothiadiazole.
j The aromatic or paraffinic carboxylic acid can be any of the !following:
! An alkylsulfuramido carboxylic acid having the formula:
~I. R - so2---N--(CH2)x ~ CH
ll An arylsul~uramido carboxylic acid ha~ing the formula:
~!II. ~ S2--N----~CH2)x~~~CH
!1i j' An acyclic carboxylic acid having the formula:
IIIIII. R 1 --N~--(CH2)X--COOH
,~
I, .
Il ~144144 IIV. A fatty acid sarcoside having the formula:
¦ R---C - N - CH2 COO~X+
Iv. An alkenyl dicarboxylic acid having the formula:
jR - CH _ CH - CH2 - CH - COOH
An alkylphenyl carboxylic acid having the formula:
VI.CH3 _ C - ~ - COOH
I
,IVII. or mixture of these where R is hydrogen or an alkyl group, and the subsript X is at least 14.
l~ The amine componént can be any secondary or tertiary amine of !Isufficient reactivity to react with the boric acid and organic ,,carboxylic acid~ components. Suitable amines include di- or tri-¦¦ethanolamine or triisopropanol amine; and 2-dimethylamino ~ I
,2-methyl, l-propanol amine. The carboxylic acid can be arylsulfon-¦
li i llamidocarboxylic acid.
1 The wetting agent can be any wetting agent compatible with ,the remainder of the system. It should be low foaming and totally ' 'water soluble. Suitable wetting agents are Pluronic L-43 avail-¦able from the BASF Wyandotte Corporation, and Niaproof 08 from ¦Niacet Chemical Company.
20As indicated previously, compatible germicides (fungicides and bactericides) optionally can also be included in amounts up to 6 parts per 100 parts of additive A suitable fungicide and a bactericide are Grotan and Bioban, available from the Lehn and Fink Co., Inc., and IMC Chemicals Group, Inc., respectively.
1,! The antifoaming agent is added in an amount up to 1 part per 100 parts by weight of additive. A suitable antifoaming agent is SAG 30 available from Union Carbide Corporation.
.
I .
, _7_ 1 1144~44 ¦l l'he remainder of the additive (concentrate) is made up with Iwater added to bring the total weight of the additive op to 100 ,!parts by weight- ~
I To formulate an aqueous grinding or cutting fluid composition,¦
'the above-described additive (concentrate) is diluted with ;additional water in an amount of between 2 and 15 parts of additive ~per 100 parts of water. The resulting cutting fluid composition is ¦lapplied to the metal surface being worked such as by machining, milling or cutting in the conventional manner.
- 10 When aluminum metal is machined using an aqueou~ base coolant coJItaining sodium glu,conate the machined surface is less suscep-tible to corrosion. The utility of the water-base concentrate and water-base coolant and lubricant compositions is further enhanced by the addition of between about 1 and 4 p~rts of sodium gluconate.
i' I
!
"
il I
'~
! . 'I
, . ..
' -8-1 1~44144 OIL BASE COOLANT AND LUBRICANT
., I
I An oil-base coolant and lubricant was prepared by mixing the ¦,following components:
Parts by Weight Mineral oil 81 . 2,1,3-benzothiadiazole 3 Extreme pressure additive 10 (mixture of chlorimated 10 '! paraffins and sulfurized ;; fats) .
. j Rust preventative (Tectyl 477, 3 Ashland Oil, Inc.) Il Mist suppressant 3 ii 15 ~ ExAMpLE 2 i OIL-IN-WATER-EMULSION CONCENTRATE
AND COOLANT AND LUBRICANT COMPOSITION
I, A concentrate was prepared by mixing the following components:
¦~ Parts by Weight 20 ll Sodium sulfonate 18 Oleic acid 1 Triethanol amine 1 .
¦ Bactericide(IMC Chemicals Group, l Inc.) Antifoaming agent (Napco NDW, 1 Diamond Shamrock, Inc.) Extreme pressure agent 10 (chlorinated paraffins) ,! Tolyltriazole 3 30 ¦, Mineral Oil 65 11 loo '1 1 Il ~144~
¦! This concentrate was then used to prepare a metal-worklng coolant and lubricant by diluting it in a ratio of 3 parts by ~eight of concentrate to 97 parts of water.
~ EXAMPLE 3 WATER-BASE CONCENTRATE AND
COOLANT AND LUBRICANT COMPOSITION
A concentrate was prepared by mixing the following components:
Parts by Weight Boric acid 6 10 ii Diethanol amine 12 -j; Arylsulfonamidocarboxylic acid4 (Hostacar~H Liquid)*
i~ Bactericide (IMC Chemicals Group, Inc.) ll Antifoaming agent (Napco NDW, Diamond 15 ll Shamrock, Inc.) il Sodium gluconate 2 ¦' Tolyltriazole 5 ; Polyglycol (lubricating additive)** 5 I Water 64 I Total 100 *Product of American Hoechst Corporation, having a specific gravity of 1.17 + 0.05, solidification point of -16 C and acid number of 161+ 10.
jl** This component is optional but its use increases lubricity.
l~r~e ~ lD-j ! ~
Il 1144~44 ' ¦ This concentrate was diluted in a ratio of 3 parts of concen-trate to 97 parts of water to form a water-base metal working ' ~oolant and lubricant.
¦ Tests of metal-working coolant and lubricant compositions in leach of the preceding examples were conducted. The resistance of specimens of tungsten carbide particles bonded together with cobalt to leaching by the liquid coolants and lubricants was . observed to be substantially reduced.
Applicants in the preceding description of their invention ¦!have disclosed what they believe to be the best mode of utilizing their invention. The metal working coolants and lubricants are compatible with ferrous and non-ferrous metals including the ~ l~ellow metal alloys such as brass and copper. The water-base 'llcompositions are markedly effective in minimizing the corrosion !lof aluminum.
i ` , ~ .
i 1,
¦' This invention relates to corrosion inhibitors for cobalt and nickel in the metallic form. More specifically this invention ~¦relates to water-base, oil-base, and oil-in-water emulsion lubri-~ !
................... .
1 ~44~44 icant and coolant compositions, used in the drilling, cutting and~¦l illing and other metal working operations.
Il BACKGROUND OF THE INVENTION
Il A large percentage of industrial cutting tools used to~
j,drill, cut, grind, and mill metals are made of tungsten carbide particles held together by a cobalt bonding agent. In a few instances the bonding agent may be nickel or platinum. The drilling, cutting, milling, or other metal working step requires the application of a liquid coolant or lubricant at the area of contact between the metal surface being machined and the drilling, cutting or milling tool. Although water or mineral oil can be ~used alone as a coolant or lubricant the practice has been to add icompounds which increa,e the lubricity and cooling ability of the liquid and which dela, ts deterioration. These added compounds ,often, however, contain sequestering (chelating) agents and lmoities such as sulfur, chlorine, carboxyl groups and hydroxyl ¦'ions. It has been observed that when cutting, drilling or milling lltools which are made up of tungsten carbide particles bonded with j ilcobalt or nickel metal are exposed to these cutting fluids contain-ing chelating agents or moities such as sulfur, chlorine, carboxyl¦Igroups and hydroxyl ions, the cobalt or nickel is leached away.
Leaching of the cobalt or nickel matrix from the tool leaves a residue of carbide particles and results in premature failure of lthe tool. The presence of sequesterants or moities in the coolant lor lubricant, as well as the mere presence of hydrogen and hydroxyl ions in a water-base cutting fluid, are thought to be responsible for the leaching of cobalt (or nickel). An object of this inven-tion, therefore, is to reduce the corrosion of cobalt and nickel 1, , -2-4~44 surfaces. Another object of this invention is to prevent or reduce the rate of leaching of cobalt and nickel binder from Imachining tools made up of abrasive particles such as tungsten ¦~arbide and a binder material such as cobalt or nickel.
5 ¦1 Another object of this lnvention is to prevent or reduce the ~orrosion or oxidation of aluminum alloys during the said machining action when wat~r-base coolants and lubricants are used.
. ~ SUMMARY OF THE INVENTION
, I
Briefly stated this invention comprises contacting with a solution of a triazole or thiadiazole compound a cobalt or nickel surface exposed to leaching action by a liquid agent. Ordinarily ~, ~the triazole or thiadiazole compound will be contained in the ',liquid leaching agent. In another aspect this invention comprises !a concentrate for preparing an aqueous base, oil base or oil-in-Iwater emulsion lubricant and coolant composition containingtherein a triazole or thiadiazole or mixtures thereof. In still another aspect this invention comprises the coolant and lubricant composition made by diluting the concentrate with oil or water.
!'In still another aspect this ihvention comprises the method of ¦¦drilling, grinding, cutting or otherwise working a metal utilizing llthe coolant and lubricant composition described above. The utility ¦!of the water-base concentrate and water-base coolant composition ~s further enhanced by the addition of 1 to 4 parts of sodium . ~luconate. Specifically when aluminum is being machined the Isodium gluconate prev~nts corrosion.
DE~AI~ED DESCRIPTION OF THE INVENTION
The triazole compounds utilized in this invention have the ;generic formula:
Il 1144144 ¦~here R is hydrogen or a methyl substituent. If R is hydrogen ¦the compound is benzene triazole and if R is a methyl radical llthen the compound is tolyl triazole.
¦¦ The thiadiazole compounds utilized in this invention can jhave the generic formula:
R ~
here R' is a hydrogen or a methyl substituent. When Rlis hydrogen then the compound is 2,1,3-benzothiadiazole. Other thiadiazole compounds which can be utilized are 2,5-dimercapto-ll1,3,4-thiadiazole having the structural formula:
N ~ N
HS -C ~ C -SH
!the disodium salt thereof, disodium 2,5-dimercaptothiadiazole ,having the formula:
,! N N
I' NaS -C~ f -S~a !~and di-(triethanolammonium) dimercaptothiadiazole.
i In the following description all compositions are described in parts by weight unless specified otherwise.
¦ OIL BASE LIQUID
COOLANT AND LUBRICANT COMPOSITION
The oil-base working-composition comprises between 80 and 95 parts of mineral oil; and between l and 5 parts of one of the itriazole or dithiazole compounds shown above or mixtures thereof.
,~Optionally other additives can be added such as between l and 10 lparts of an extreme pressure lubricant, between 1 and 5 parts of llrust preventive and between 1 and 5 parts of mist suppressant.
¦,These additives are known to those skilled in the art and are i i:l44144 readily available in commerce. In the oil-base lubricant composi-tion made therefrom the preferred triazole compound is benzyltria-~zole and the preferred thiadiazole compound is 2,1,3-benzothiadia-I!zole.
1~ A suitable extreme pressure lubricant is Klora 6001 manufac-itured by Kiel Chemical. A suitable rust preventive is Tectyl 477 anufactured by Valvoline International and a suitable mist . ¦suppressant is manufactured by Exxon Corporation. When these 'optional compounds are added, the triazole and thiadiazole ,compounds are most effective since the introduction of these materials also bring into the lubricant composition those agents thought to be responsible for the leaching of cobalt and nickel 'from cutting and grinding tools.
. . ~
I; i 15 l~ COOLANT AND LUBRICANT COMPOSITIONS
'!' i The concentrate which is to be subsequently diluted with ~ater to form an oil-in-water emulsion coolant and lubricant ~comprises between 60 and 80 parts of mineral oil; between l and j5 parts of one of the triazole or thiadiazole compounds above or mixtures thereof; and between 15 and 25 parts of an emulsifier.
Optionally there may also be added between l and 2 parts of a ¦bactericide, between 3 and 10 parts of an extreme pressure lubri-~cant and between l and 3 parts of an antifoaming agent. The ilubricant and coolant composition is prepared by diluting the ~above-described composition with water until the concentration of ¦Itriazole or thiadiazole is between about 2S0 and about 2000 parts per million. For these oil-in-water emulsion compounds the preferred triazole is benzyltriazole and the preferred thiadiazole 'is 2,5-dimercapto-1,3,4-thiadiazole.
3G !! A suitable emulsifier is sodium sulfate, a suitable bacteri-i!cide is Bioban P 1487; a suitable extreme pressure lubricant is ~loro 6001 and a suitable antifoaming agent is Nopco NDW available from Diamond Shamrock Corporation.
1 ~ ~r~z~, e n~\~r~ 5 Il 1144144 . !
WATER-BASE CONCENTRATES AND WATER-BASE COOLANT
AND LUBRICANT COMPOSITIONS
The concentrate which is to be subsequently diluted with ~water to form a water-base coolant and lubricant comprises between ~60 and ~0 parts of water; be.tween 3 and 10 parts of a triazole or l¦thiadlazole or mixtures thereof; between 2 and 8 parts of an ¦!aromatic or paraffinic carboxylic acid; between 2 and 10 parts of ¦~oric acid; and between 5 an~ 20 parts of an amine or mixture of ~amines that will react with the carboxylic acid component of the composition. Optionally there may be added between .l and 5 parts ;of a wetting agent; between 1 and 2 parts of a bactericide and ~fungicide; and between l and 2 parts of an antifoaming agent. The triazole and thiadiazole compounds are particularly effective ''against the leaching of cobalt and nickel when these optional Iadditives are included since they bring into the system those ~oities which contribute to leaching. In this water-base concen- ¦
'!trate and the water-base lubricant made by adding water to the lconcentrate the preferred triazole compound is tolyltriazole and lthe preferred dithiazole compound is the sodium salt of 2,5-!Idimercaptothiadiazole.
j The aromatic or paraffinic carboxylic acid can be any of the !following:
! An alkylsulfuramido carboxylic acid having the formula:
~I. R - so2---N--(CH2)x ~ CH
ll An arylsul~uramido carboxylic acid ha~ing the formula:
~!II. ~ S2--N----~CH2)x~~~CH
!1i j' An acyclic carboxylic acid having the formula:
IIIIII. R 1 --N~--(CH2)X--COOH
,~
I, .
Il ~144144 IIV. A fatty acid sarcoside having the formula:
¦ R---C - N - CH2 COO~X+
Iv. An alkenyl dicarboxylic acid having the formula:
jR - CH _ CH - CH2 - CH - COOH
An alkylphenyl carboxylic acid having the formula:
VI.CH3 _ C - ~ - COOH
I
,IVII. or mixture of these where R is hydrogen or an alkyl group, and the subsript X is at least 14.
l~ The amine componént can be any secondary or tertiary amine of !Isufficient reactivity to react with the boric acid and organic ,,carboxylic acid~ components. Suitable amines include di- or tri-¦¦ethanolamine or triisopropanol amine; and 2-dimethylamino ~ I
,2-methyl, l-propanol amine. The carboxylic acid can be arylsulfon-¦
li i llamidocarboxylic acid.
1 The wetting agent can be any wetting agent compatible with ,the remainder of the system. It should be low foaming and totally ' 'water soluble. Suitable wetting agents are Pluronic L-43 avail-¦able from the BASF Wyandotte Corporation, and Niaproof 08 from ¦Niacet Chemical Company.
20As indicated previously, compatible germicides (fungicides and bactericides) optionally can also be included in amounts up to 6 parts per 100 parts of additive A suitable fungicide and a bactericide are Grotan and Bioban, available from the Lehn and Fink Co., Inc., and IMC Chemicals Group, Inc., respectively.
1,! The antifoaming agent is added in an amount up to 1 part per 100 parts by weight of additive. A suitable antifoaming agent is SAG 30 available from Union Carbide Corporation.
.
I .
, _7_ 1 1144~44 ¦l l'he remainder of the additive (concentrate) is made up with Iwater added to bring the total weight of the additive op to 100 ,!parts by weight- ~
I To formulate an aqueous grinding or cutting fluid composition,¦
'the above-described additive (concentrate) is diluted with ;additional water in an amount of between 2 and 15 parts of additive ~per 100 parts of water. The resulting cutting fluid composition is ¦lapplied to the metal surface being worked such as by machining, milling or cutting in the conventional manner.
- 10 When aluminum metal is machined using an aqueou~ base coolant coJItaining sodium glu,conate the machined surface is less suscep-tible to corrosion. The utility of the water-base concentrate and water-base coolant and lubricant compositions is further enhanced by the addition of between about 1 and 4 p~rts of sodium gluconate.
i' I
!
"
il I
'~
! . 'I
, . ..
' -8-1 1~44144 OIL BASE COOLANT AND LUBRICANT
., I
I An oil-base coolant and lubricant was prepared by mixing the ¦,following components:
Parts by Weight Mineral oil 81 . 2,1,3-benzothiadiazole 3 Extreme pressure additive 10 (mixture of chlorimated 10 '! paraffins and sulfurized ;; fats) .
. j Rust preventative (Tectyl 477, 3 Ashland Oil, Inc.) Il Mist suppressant 3 ii 15 ~ ExAMpLE 2 i OIL-IN-WATER-EMULSION CONCENTRATE
AND COOLANT AND LUBRICANT COMPOSITION
I, A concentrate was prepared by mixing the following components:
¦~ Parts by Weight 20 ll Sodium sulfonate 18 Oleic acid 1 Triethanol amine 1 .
¦ Bactericide(IMC Chemicals Group, l Inc.) Antifoaming agent (Napco NDW, 1 Diamond Shamrock, Inc.) Extreme pressure agent 10 (chlorinated paraffins) ,! Tolyltriazole 3 30 ¦, Mineral Oil 65 11 loo '1 1 Il ~144~
¦! This concentrate was then used to prepare a metal-worklng coolant and lubricant by diluting it in a ratio of 3 parts by ~eight of concentrate to 97 parts of water.
~ EXAMPLE 3 WATER-BASE CONCENTRATE AND
COOLANT AND LUBRICANT COMPOSITION
A concentrate was prepared by mixing the following components:
Parts by Weight Boric acid 6 10 ii Diethanol amine 12 -j; Arylsulfonamidocarboxylic acid4 (Hostacar~H Liquid)*
i~ Bactericide (IMC Chemicals Group, Inc.) ll Antifoaming agent (Napco NDW, Diamond 15 ll Shamrock, Inc.) il Sodium gluconate 2 ¦' Tolyltriazole 5 ; Polyglycol (lubricating additive)** 5 I Water 64 I Total 100 *Product of American Hoechst Corporation, having a specific gravity of 1.17 + 0.05, solidification point of -16 C and acid number of 161+ 10.
jl** This component is optional but its use increases lubricity.
l~r~e ~ lD-j ! ~
Il 1144~44 ' ¦ This concentrate was diluted in a ratio of 3 parts of concen-trate to 97 parts of water to form a water-base metal working ' ~oolant and lubricant.
¦ Tests of metal-working coolant and lubricant compositions in leach of the preceding examples were conducted. The resistance of specimens of tungsten carbide particles bonded together with cobalt to leaching by the liquid coolants and lubricants was . observed to be substantially reduced.
Applicants in the preceding description of their invention ¦!have disclosed what they believe to be the best mode of utilizing their invention. The metal working coolants and lubricants are compatible with ferrous and non-ferrous metals including the ~ l~ellow metal alloys such as brass and copper. The water-base 'llcompositions are markedly effective in minimizing the corrosion !lof aluminum.
i ` , ~ .
i 1,
Claims (12)
1. A method for reducing the leaching of cobalt from a surface through exposure of said surface to agents capable of leaching cobalt, comprising contacting a surface containing cobalt with a liquid composition containing a compound selected from the group consisting of triazole compounds having the structural formula:
wherein R is a hydrogen or a methyl radical;
thiadiazole compounds having the structural formula:
wherein R' is hydrogen or a methyl radical;
thiadiazole compounds having the structural formula:
wherein R" is hydrogen or sodium;
di-(triethanolammonium) dimercapto-thiadiazole; and mixtures thereof wherein said compound is present in an amount effective to reduce the leaching of cobalt.
wherein R is a hydrogen or a methyl radical;
thiadiazole compounds having the structural formula:
wherein R' is hydrogen or a methyl radical;
thiadiazole compounds having the structural formula:
wherein R" is hydrogen or sodium;
di-(triethanolammonium) dimercapto-thiadiazole; and mixtures thereof wherein said compound is present in an amount effective to reduce the leaching of cobalt.
2. The method of claim 1 wherein said surface containing said metal is made of tungsten carbide particles bonded by cobalt.
3. The method of claim 1 wherein the concentration of said compound in said liquid composition is between about 1 and about 5 parts per 100 by weight.
4. The method of claim 1, 2 or 3 wherein said compound is tolyltriazole.
5. The method of claim 1, 2 or 3 wherein said compound is 2,1,3-benzothiadiazole.
6. The method of claim 1 wherein said liquid composition comprises about 80 to about 95 parts by weight of mineral oil and about 1 to about 5 parts by weight of said compound.
7. The method of claim 6 wherein said composition also contains at least one of 1 to 10 parts by weight of an extreme pressure lubricant, 1 to 5 parts by weight of rust preventative or 1 to 5 parts by weight of a mist suppressant.
8. The method of claim 2 or 3 wherein said composition also contains at least one of 1 to 10 parts by weight of an extreme pressure lubricant, 1 to 5 parts by weight of rust preventative or 1 to 5 parts by weight of a mist suppressant.
9. The method of claim 1 wherein said liquid composition is an oil-in-water emulsion which comprises an oil-in-water concentrate comprising 60 to 80 parts by weight of mineral oil, 1 to 5 parts by weight of said compound, 15 to 25 parts by weight of an emulsifier; and a sufficient amount of water to provide about 250 to about 2000 parts per million of said compound in said emulsion.
10. The method of claim 9 wherein said concentrate also contains at least one of 1-2 parts by weight of bactericide, 3-10 parts of an extreme pressure lubricant and 1-3 parts of an antifoaming agent.
11. The method of claim 9 or 10 wherein said emulsifier includes sodium sulfate.
12. The method of claim 1 wherein said liquid composition is a water base composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000380346A CA1144144A (en) | 1981-06-22 | 1981-06-22 | Metal working coolant and lubricant composition containing triazole and thiadiazole compounds and use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000380346A CA1144144A (en) | 1981-06-22 | 1981-06-22 | Metal working coolant and lubricant composition containing triazole and thiadiazole compounds and use thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1144144A true CA1144144A (en) | 1983-04-05 |
Family
ID=4120293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000380346A Expired CA1144144A (en) | 1981-06-22 | 1981-06-22 | Metal working coolant and lubricant composition containing triazole and thiadiazole compounds and use thereof |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1144144A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115746945A (en) * | 2022-11-30 | 2023-03-07 | 上海纳米技术及应用国家工程研究中心有限公司 | Water-based cutting fluid |
-
1981
- 1981-06-22 CA CA000380346A patent/CA1144144A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115746945A (en) * | 2022-11-30 | 2023-03-07 | 上海纳米技术及应用国家工程研究中心有限公司 | Water-based cutting fluid |
| CN115746945B (en) * | 2022-11-30 | 2023-11-24 | 上海纳米技术及应用国家工程研究中心有限公司 | Water-based cutting fluid |
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