CN1351105A - Corrosion inhibitor for cooling liquid of IC engine - Google Patents
Corrosion inhibitor for cooling liquid of IC engine Download PDFInfo
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- CN1351105A CN1351105A CN 00131108 CN00131108A CN1351105A CN 1351105 A CN1351105 A CN 1351105A CN 00131108 CN00131108 CN 00131108 CN 00131108 A CN00131108 A CN 00131108A CN 1351105 A CN1351105 A CN 1351105A
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Abstract
A corrosion inhibitor for the cooling liquid of IC engine contains polyacrylamide, benzotriazazole, borate, nitite, molybdate or tungstate, monocarboxylic acid and its salt, and bicarboxylic acid and its salt. It can prevent the corrosion, cavitation and pitting of cooling water to workpieces of IC engine and the generation of water scale.
Description
The present invention relates to contain benzotriazole, water quality stabilizer ethylene diamine tetra methylene phosphonic acid sodium, hydrolytic polymaleic anhydride, polyacrylamide, inorganics such as borate, nitrite, molybdate, tungstate etc., organism as monocarboxylic acid and the salt thereof that contains 6～12 carbon atoms, the Inhibitor of Internal Combustion Engine Coolant that contains the di-carboxylic acid and the salt thereof of 6～12 carbon atoms, particularly be applicable to the inhibiter of large-scale, heavy-duty diesel engine and petrol motor water coolant or deicing fluid.
General multiple metal and the alloy of using of cooling water of internal combustion engine system, as cast aluminium, cast iron, steel, scolding tin, brass and red copper etc., these metals or alloy corrode under the effect of water coolant or deicing fluid (be generally and add ethylene glycol or propylene glycol in water), when serious, will cause parts to leak, leak gas, even oil engine is scrapped.In order to reduce corrosion, prolong parts life-span, Modern Internal-Combustion Engine generally adopts in closed-type circulating cooling water or the deicing fluid and adds inhibiter.
Cooling fluid in the cooling system produces bubble owing to entrained air or owing to reasons such as liquid internal pressure fluctuation, parts vibration make the liquid cavitation, produces cavity, and cavity collapse makes that being subjected to cavitation pitting with the contacted parts of cooling fluid destroys.The cavitation pitting phenomenon is the needle-like aperture of trooping, surface clean, and concentrate at the position, is commonly considered as machinery and the coefficient result of electrochemistry.Mainly occur in cylinder sleeve, water pump impeller and fluid pipeline sectional area sharp change in elevation and the fluid pipeline flow direction sharp change in elevation of internal-combustion engine cooling system.The cavitation pitting phenomenon is modern strong common phenomenon of carrying internal-combustion engine cooling system, and it usually causes parts such as cylinder sleeve, water pump impeller and fluid pipeline to be scrapped too early.Chinese patent ZL94113222.6 discloses the inhibiter that a kind of diesel locomotive water coolant is used, it can guarantee that diesel locomotive moves and not occur cavitation pitting more than 200,000 kilometers, but for the strong oil engine that carries, its anti-cavitation pitting performance is not satisfactory, and this inhibiter contains silicate, have now found that the silicate of cooling water system will cause the too early inordinate wear of rubber part.There is the defective of cast aluminium spot corrosion in the actual use of the disclosed a kind of multi-functional cooling water of internal combustion engine inhibiter of Chinese patent ZL8686107144, and can not satisfies the requirement of JB225-1996 corrosion weight loss standard.
The purpose of this invention is to provide a kind of requirement that can prevent effectively that the parts cavitation pitting from can prevent the spot corrosion of cast aluminium parts again and satisfying JB225-1996 glassware method corrosion weight loss standard.
The object of the present invention is achieved like this: add inhibiter of the present invention in tap water or other clean well water, river and spring, organism wherein and inorganics acting in conjunction form densification in the metallic surface and thin and tough and tensile film, slow down cavitation pitting and corrosion; Water quality stabilizer wherein can form stable chelate with calcium, the magnesium ion in the water, prevents the formation and the deposition of incrustation scale.
Composition and the weight percent of inhibiter of the present invention in cooling fluid is as follows:
Polyacrylamide 0.05%～2%
Benzotriazole 0.05%～2%
At least contain a kind of water quality stabilizer: ethylene diamine tetra methylene phosphonic acid sodium, hydrolytic polymaleic anhydride 0.0004%～0.004%
At least contain a kind of inorganics: borate, nitrite, molybdate, tungstate, phosphoric acid salt 0.05%～2%
At least contain a kind of machine thing: contain 6～12 carbon atom monocarboxylic acids and salt thereof, contain 6～12 carbon atom di-carboxylic acid
And salt 0.05%～2%
As pH value not in specialized range 7.5～10.5, with sodium hydroxide or potassium hydroxide adjustment.
Water (or ethylene glycol, propylene glycol add water): surplus promptly is supplemented to 100%
Wherein: polyacrylamide can form densification in the metallic surface and thin and tough and tensile film, slows down cavitation pitting and corrosion.
Benzotriazole is the good inhibiter of copper and alloy thereof, can form stable complex compound protective membrane with copper atom, prevents the corrosion of copper.
Water quality stabilizer ethylene diamine tetra methylene phosphonic acid sodium and hydrolytic polymaleic anhydride can form stable chelate with calcium in the water, magnesium ion, even make calcium in the water, magnesium ion concentration very high, also can not deposit.Moreover, it can also make the lattice of incrustation scale that distortion and distortion take place, and it is thin that hard incrustation scale is fluffed, and the incrustation scale ion is floated on a liquid.Both act on simultaneously, have synergistic effect.
Borate such as sodium tetraborate are a kind of PH buffer reagent, ferrous metal there is good corrosion inhibition, nitrite such as Sodium Nitrite are that anodic corrosion inhibitor and borax have been used the effect that multiplies each other, and molybdate such as Sodium orthomolybdate, tungstate such as sodium wolframate all are anodic corrosion inhibitor.
Contain the particularly spot corrosion of corrosion that the monocarboxylic acid and the salt thereof of 6～12 carbon atoms, the di-carboxylic acid that contains 6～12 carbon atoms and salt thereof can effectively prevent the aluminium parts.
Ethylene glycol or propylene glycol are the water coolant frostproofers of generally acknowledging.
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment 1
With the 4.8g sodium tetraborate, 2.4g Sodium orthomolybdate grind into powder joins in the 500ml water, and the limit edged stirs, add the 2.4g polyacrylamide again, 2.1g sodium hydroxide, 0.2g benzotriazole, 0.0003g ethylene diamine tetra methylene phosphonic acid sodium, 0.0009g hydrolytic polymaleic anhydride, add the 10ml enanthic acid again, 3g certain herbaceous plants with big flowers diacid, make up water is to 1L, stir, can obtain having the cooling fluid of anticorrosion ability.
Embodiment 2
With the 4.8g sodium tetraborate, 2.4g Sodium orthomolybdate grind into powder joins in the 500ml water, and the limit edged stirs, add the 2.4g polyacrylamide again, 2.1g sodium hydroxide, 0.2g benzotriazole, 0.0003g ethylene diamine tetra methylene phosphonic acid sodium, 0.0009g hydrolytic polymaleic anhydride adds the 10ml enanthic acid again, 3g certain herbaceous plants with big flowers diacid, add 333ml ethylene glycol, make up water stirs to 1L, can obtain freezing point and be-33 ℃ of deicing fluid with anticorrosion ability.
The corrosion protection liquid of configuration, according to SH/T 0085-91 glassware method corrosion experiment, its weightlessness is as follows:
Table 1 corrosion protection liquid glassware method corrosion weight loss
After the above-mentioned test, cast aluminium, scolding tin test specimen surface all do not have spot corrosion.Corrosion protection liquid is prevented the cavitation pitting performance, adopts following testing apparatus, with reference to GB6383-86.Test-results such as table 2.
| Cast aluminium | Cast iron | Steel | Scolding tin | Brass | Red copper | |
| Corrosion weight loss (mg) | 7 | ?2 | ?2 | ?4 | ?1 | ?1 |
| The JB standard | 30 | ?10 | ?10 | ?30 | ?10 | ?10 |
Table 2 cavitation pitting weightlessness
| Tap water | Corrosion protection liquid | |
| Cavitation pitting weightlessness (mg) | 47 | ?3 |
Weightlessness in cavitation pitting corrosion inhibition rate=(weightlessness in the weightlessness in the tap water-corrosion protection liquid)/tap water=(47-3)/47=93%
Table 1 and table 2 clearly show that its Corrosion Protection of corrosion protection liquid of the present invention meets JB225-96 to the requirement of engine coolant Corrosion Protection.To the spheroidal graphite cast iron cavitation pitting corrosion inhibition rate of making certain cylinder sleeve up to more than 90%.
Claims (6)
1. oil engine closed circuit cooling system water coolant or the employed inhibiter of deicing fluid is characterized in that being disposed by following weight percent by following component:
Polyacrylamide 0.05%～2%,
Benzotriazole 0.05%～2%,
At least contain a kind of water quality stabilizer: ethylene diamine tetra methylene phosphonic acid sodium, hydrolytic polymaleic anhydride
0.0001％～0.004％，
At least contain a kind of inorganics: borate, nitrite, molybdate, tungstate, phosphoric acid salt
0.05％～2％，
At least contain a kind of organism: contain 6～12 carbon atom monocarboxylic acids and salt thereof, contain 6～12 carbon atom di-carboxylic acid and salt 0.05%～2% thereof,
As pH value not in specialized range 7.5～10.5, with sodium hydroxide or potassium hydroxide adjustment.
2. inhibiter according to claim 1, Molecular Weight for Polyacrylamide is less than 300,000.
3. inhibiter according to claim 1, water quality stabilizer preferably includes ethylene diamine tetra methylene phosphonic acid sodium and hydrolytic polymaleic anhydride, and its per-cent is 1: 3.
4. inhibiter according to claim 1, at least contain following a kind of inorganics: borate, nitrite, molybdate, tungstate, phosphoric acid salt, consider from environmental angle, a small amount of or avoid using nitrite and phosphoric acid salt, preferably use molybdate or tungstate.
5. inhibiter according to claim 1, at least contain following a kind of organism: contain 6～12 carbon atom monocarboxylic acids and salt thereof, contain 6～12 carbon atom di-carboxylic acid and salt thereof, using acid or sour sodium, enanthic acid or enanthic acid sodium and certain herbaceous plants with big flowers diacid or certain herbaceous plants with big flowers diacid sodium is a kind of preferably selection.
6. according to any composition described in the claim 1-5, be used for the inhibiter of cooling water of internal combustion engine or deicing fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00131108 CN1351105A (en) | 2000-10-30 | 2000-10-30 | Corrosion inhibitor for cooling liquid of IC engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00131108 CN1351105A (en) | 2000-10-30 | 2000-10-30 | Corrosion inhibitor for cooling liquid of IC engine |
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| CN 00131108 Pending CN1351105A (en) | 2000-10-30 | 2000-10-30 | Corrosion inhibitor for cooling liquid of IC engine |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1340840A2 (en) * | 2002-03-01 | 2003-09-03 | Organo Corporation | Organic corrosion inhibitors and corrosion control methods for water systems |
| CN100374840C (en) * | 2005-05-26 | 2008-03-12 | 二重集团（德阳）重型装备股份有限公司 | Pressure testing liquid for metal container and conduit and preparation process thereof |
| CN100441657C (en) * | 2006-06-12 | 2008-12-10 | 蓝星环境工程有限公司 | Cooling fluid of engine |
| CN100588625C (en) * | 2008-05-15 | 2010-02-10 | 杨兴富 | Softener for station boiler sediment incrustation and two-stage incrustation-removing method |
| CN101012415B (en) * | 2007-02-01 | 2011-04-20 | 大连三达奥克化学有限公司 | Safety on-line contaminant removing cleaning agent |
| CN101381170B (en) * | 2007-09-07 | 2011-10-26 | 袁晓东 | Corrosion inhibitor of internal combustion engine cooling liquid and production process |
| CN102653672A (en) * | 2011-12-21 | 2012-09-05 | 上海东昊油品有限公司 | Environmentally-friendly automobile engine coolant |
| CN102660743A (en) * | 2012-04-27 | 2012-09-12 | 重庆大学 | Corrosion inhibitor for calcium chloride antifreeze solution and preparation method thereof |
| CN102732232A (en) * | 2012-07-19 | 2012-10-17 | 张家港迪克汽车化学品有限公司 | 1,2-propanediol antifreezing cooling liquid |
| CN102766442A (en) * | 2012-08-08 | 2012-11-07 | 飞圣达（天津）有限公司 | Reinforcing agent for engine cooling system and preparation method and application thereof |
| CN103451659A (en) * | 2012-05-28 | 2013-12-18 | 栗田工业株式会社 | Method of preventing corrosion in closed cooling water system |
| CN103651586A (en) * | 2013-12-09 | 2014-03-26 | 山东华亚环保科技有限公司 | Germicide-algicide used for circulating cooling water |
| CN105331336A (en) * | 2015-11-24 | 2016-02-17 | 张家港迪克汽车化学品有限公司 | Coolant for internal combustion engines |
| CN107629762A (en) * | 2016-07-19 | 2018-01-26 | 银川艾尼工业科技开发股份有限公司 | A kind of solar heat-exchange medium |
| CN113025273A (en) * | 2019-12-09 | 2021-06-25 | 山东菏泽三仪生物工程有限公司 | Special antifreezing powder for disinfectant |
| CN113930221A (en) * | 2021-10-27 | 2022-01-14 | 常州市鑫光化工科技有限公司 | Special cooling liquid for diesel locomotive |
-
2000
- 2000-10-30 CN CN 00131108 patent/CN1351105A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1340840A3 (en) * | 2002-03-01 | 2004-08-25 | Organo Corporation | Organic corrosion inhibitors and corrosion control methods for water systems |
| EP1340840A2 (en) * | 2002-03-01 | 2003-09-03 | Organo Corporation | Organic corrosion inhibitors and corrosion control methods for water systems |
| CN100374840C (en) * | 2005-05-26 | 2008-03-12 | 二重集团（德阳）重型装备股份有限公司 | Pressure testing liquid for metal container and conduit and preparation process thereof |
| CN100441657C (en) * | 2006-06-12 | 2008-12-10 | 蓝星环境工程有限公司 | Cooling fluid of engine |
| CN101012415B (en) * | 2007-02-01 | 2011-04-20 | 大连三达奥克化学有限公司 | Safety on-line contaminant removing cleaning agent |
| CN101381170B (en) * | 2007-09-07 | 2011-10-26 | 袁晓东 | Corrosion inhibitor of internal combustion engine cooling liquid and production process |
| CN100588625C (en) * | 2008-05-15 | 2010-02-10 | 杨兴富 | Softener for station boiler sediment incrustation and two-stage incrustation-removing method |
| CN102653672A (en) * | 2011-12-21 | 2012-09-05 | 上海东昊油品有限公司 | Environmentally-friendly automobile engine coolant |
| CN102660743A (en) * | 2012-04-27 | 2012-09-12 | 重庆大学 | Corrosion inhibitor for calcium chloride antifreeze solution and preparation method thereof |
| CN102660743B (en) * | 2012-04-27 | 2013-12-25 | 重庆大学 | Corrosion inhibitor for calcium chloride antifreeze solution and preparation method thereof |
| CN103451659B (en) * | 2012-05-28 | 2016-06-08 | 栗田工业株式会社 | Method of inhibiting corrosion in airtight cooling water system |
| CN103451659A (en) * | 2012-05-28 | 2013-12-18 | 栗田工业株式会社 | Method of preventing corrosion in closed cooling water system |
| CN102732232A (en) * | 2012-07-19 | 2012-10-17 | 张家港迪克汽车化学品有限公司 | 1,2-propanediol antifreezing cooling liquid |
| CN102766442A (en) * | 2012-08-08 | 2012-11-07 | 飞圣达（天津）有限公司 | Reinforcing agent for engine cooling system and preparation method and application thereof |
| CN102766442B (en) * | 2012-08-08 | 2016-03-23 | 泰奥星（天津）有限公司 | Engine-cooling system strengthening agent and its preparation method and application |
| CN103651586A (en) * | 2013-12-09 | 2014-03-26 | 山东华亚环保科技有限公司 | Germicide-algicide used for circulating cooling water |
| CN105331336A (en) * | 2015-11-24 | 2016-02-17 | 张家港迪克汽车化学品有限公司 | Coolant for internal combustion engines |
| CN107629762A (en) * | 2016-07-19 | 2018-01-26 | 银川艾尼工业科技开发股份有限公司 | A kind of solar heat-exchange medium |
| CN113025273A (en) * | 2019-12-09 | 2021-06-25 | 山东菏泽三仪生物工程有限公司 | Special antifreezing powder for disinfectant |
| CN113930221A (en) * | 2021-10-27 | 2022-01-14 | 常州市鑫光化工科技有限公司 | Special cooling liquid for diesel locomotive |
| CN113930221B (en) * | 2021-10-27 | 2023-12-26 | 常州市鑫光新材料科技有限公司 | Special coolant for diesel locomotive |
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