JPH0826465B2 - Anti-corrosion agent and antifreeze containing this anti-corrosion agent - Google Patents
Anti-corrosion agent and antifreeze containing this anti-corrosion agentInfo
- Publication number
- JPH0826465B2 JPH0826465B2 JP3803287A JP3803287A JPH0826465B2 JP H0826465 B2 JPH0826465 B2 JP H0826465B2 JP 3803287 A JP3803287 A JP 3803287A JP 3803287 A JP3803287 A JP 3803287A JP H0826465 B2 JPH0826465 B2 JP H0826465B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- rust preventive
- antifreeze
- corrosion
- preventive agent
- 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
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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明に係る防錆剤と、この防錆剤を含有した不凍
液とは、自動車用エンジンの冷却水に混入して、上記自
動車用エンジンのウォータジャケット内面や、このエン
ジンに付属のラジエータの内面の防錆、更には上記冷却
水の凍結防止を図るものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The rust preventive agent according to the present invention and an antifreeze solution containing the rust preventive agent are mixed with cooling water for an automobile engine to produce the above-mentioned automobile engine. The inner surface of the water jacket and the inner surface of the radiator attached to this engine are rustproofed, and the freezing of the cooling water is prevented.
（従来の技術） 自動車用エンジンのウォータジャケット内面や、この
エンジンに付属したラジエータ、水ポンプ等、内部に冷
却水が流通する各種機器の防錆を図る為、上記冷却水中
に、冷却水と接触する金属部品表面の腐食を防止する為
の防錆剤を混入する事が行なわれている。(Prior art) In order to prevent rust from the inner surface of the water jacket of an automobile engine, radiators and water pumps attached to this engine, and various other equipment inside which cooling water flows, contact the cooling water with the cooling water. It has been practiced to mix a rust preventive agent to prevent corrosion of the surface of metal parts.
更に、冬期に外気温度が氷点下に下がる様な寒冷地で
使用する自動車の場合、冷却水の凍結によってエンジン
やこれらの機器が破損するのを防止する為、上記冷却水
中に不凍液を混入するが、この不凍液も防錆剤を含有し
たものでなければならない。Furthermore, in the case of automobiles used in cold regions where the outside air temperature drops below freezing in winter, in order to prevent damage to the engine and these devices due to freezing of cooling water, antifreeze is mixed in the cooling water, This antifreeze must also contain a rust inhibitor.
この為従来から、特開昭58−164792号公報、その他に
開示されている様に、各種の防錆剤が提案され、使用さ
れている。Therefore, various rust preventive agents have been proposed and used conventionally, as disclosed in JP-A-58-164792 and others.
このうち、上記公報に開示された防錆剤は、燐酸、ポ
リ燐酸、これらの塩のうちから選択された１種又は２種
以上を500〜30000ppmと、モリブデン酸、タングステン
酸、バナジン酸、これらの塩、及びモリブデン、タング
ステン、バナジウムのヘテロポリ酸塩の内から選択され
た１種又は２種以上を50〜5000ppmと、ベンゾトリアゾ
ール、トリルトリアゾール、これらの塩のうちから選択
された１種又は２種以上を含有し、PH値を6.0〜8.0の範
囲としたものである。Among these, the rust preventives disclosed in the above publications include 500 to 30,000 ppm of one or more selected from phosphoric acid, polyphosphoric acid, and salts thereof, molybdic acid, tungstic acid, vanadic acid, and the like. 50 to 5000 ppm of one or more selected from the heteropolyacid salts of molybdenum, tungsten and vanadium, and 1 or 2 selected from benzotriazole, tolyltriazole and these salts. It contains at least one species and has a PH value in the range of 6.0 to 8.0.
又、従来から広く使用されている不凍液は、エチレン
グリコールを主体とし、これに燐酸基（PO4 -）、硝酸基
（NO3 -）、チアゾール、アゾール、アミン等の腐食抑制
剤、及び消泡剤を添加する事で造られている。Further, antifreeze widely used conventionally, ethylene glycol as a main component, to which phosphoric acid group (PO 4 -), nitrate group (NO 3 -), thiazole, azole, corrosion inhibitors such as amines, and defoaming It is made by adding agents.
（発明が解決しようとする課題） ところが、上述の様な成分により造られた従来の防錆
剤、並びに防錆剤を含有した不凍液の場合、次に述べる
様な不都合を生じる。(Problems to be Solved by the Invention) However, in the case of the conventional rust preventive agent made of the above-mentioned components and the antifreeze solution containing the rust preventive agent, the following disadvantages occur.
即ち、自動車用エンジンの冷却水中に混入する不凍液
の場合、エンジンの運転に伴なう冷却水の蒸発による水
補給によって次第に薄められ、30容量％以下の、比較的
薄い濃度で使用される場合が多い。従来の防錆剤含有不
凍液の場合、この様な低濃度で使用されると、条件の厳
しい場合には、必ずしも十分な防錆効果を発揮する事が
できない。That is, in the case of an antifreeze mixed in the cooling water of an automobile engine, it may be gradually diluted by water replenishment by evaporation of the cooling water accompanying the operation of the engine, and may be used in a relatively thin concentration of 30% by volume or less. Many. In the case of the conventional antifreeze solution containing a rust preventive, when it is used at such a low concentration, it is not always possible to exert a sufficient rust preventive effect under severe conditions.
又、近年過給機等を使用したエンジンの出力向上に伴
ない、冷却水の温度が高くなる傾向が強い。この為、不
凍液が熱劣化したり、更には防錆剤が消耗したりし易
く、長期間に亙って十分な凍結防止効果や防錆効果を維
持する事が難しい。In addition, the temperature of the cooling water tends to increase with the improvement of the output of the engine using a supercharger or the like in recent years. For this reason, the antifreeze liquid is likely to be thermally deteriorated and the rust preventive agent is easily consumed, and it is difficult to maintain a sufficient antifreeze effect and rust preventive effect over a long period of time.
更に近年、自動車用のラジエータをアルミニウム材に
より造る場合が多くなっている。この為、自動車用エン
ジンの冷却水が接触する金属が、従来の様に鉄や真鍮だ
けでなく、アルミニウム材も含まれる様になっている。
従って、防錆剤にこれら総ての金属の防錆を図れる性能
が要求される様になって来た。Further, in recent years, radiators for automobiles are often made of aluminum materials. Therefore, the metal with which the cooling water of the automobile engine comes into contact includes not only iron and brass as in the past, but also aluminum.
Therefore, rust preventive agents have been required to have the ability to prevent corrosion of all these metals.
本発明の防錆剤と、この防錆剤を含有した不凍液と
は、上述の様な不都合を何れも解消するものである。The rust preventive agent of the present invention and the antifreeze solution containing the rust preventive agent solve all of the inconveniences described above.
（課題を解決するための手段） 本発明の防錆剤と、この防錆剤を含有した不凍液との
うち、先ず特許請求の範囲第１項に記載した防錆剤は、
バナジウムオキシアセチルアセトネート（VO(CH2・CO・CH
2・CO・CH3)2）を0.02〜0.5重量％含む。(Means for Solving the Problems) Of the rust preventive agent of the present invention and the antifreeze solution containing the rust preventive agent, first, the rust preventive agent described in claim 1 is:
Vanadium oxyacetylacetonate (VO (CH 2 , CO, CH
2・ CO ・ CH 3 ) 2 ) 0.02 to 0.5 wt% is included.
即ち、本発明者の行なった実験によると、冷却水中に
バナジウムオキシアセチルアセトネートを添加すると、
電気化学的特性が第１図に示す様に変化し、その結果、
第２図に示す様に明らかな防食性能が得られる事を確認
できた。That is, according to the experiment conducted by the present inventor, when vanadium oxyacetylacetonate was added to the cooling water,
The electrochemical characteristics changed as shown in Fig. 1, and as a result,
As shown in FIG. 2, it was confirmed that a clear anticorrosion performance was obtained.
尚、第１図に於いて、実線ａはバナジウムオキシアセ
チルアセトネートを全く加えないASTM液の、一点鎖線ｂ
はこれにバナジウムオキシアセチルアセトネートを0.02
重量％加えたASTM液の、破線ｃは同じく0.05重量％加え
たASTM液の、二点鎖線ｄは同じく0.2重量％加えたASTM
液の、それぞれ電気化学的特性を表わしている。In FIG. 1, the solid line a is the one-dot chain line b of the ASTM solution containing no vanadium oxyacetylacetonate.
Add 0.02 of vanadium oxyacetylacetonate to it
The dashed line c of the ASTM solution added by weight% is the same as that of the ASTM solution added by 0.05% by weight, and the two-dot chain line d is the ASTM solution added by the same of 0.2% by weight.
Each represents the electrochemical properties of the liquid.
又、第２図に於いて実線ａはバナジウムオキシアセチ
ルアセトネートを全く加えないASTM液中での、一点鎖線
ｂはこれにバナジウムオキシアセチルアセトネートを0.
02重量％加えたASTM液中での、破線ｃは同じく0.05重量
％加えたASTM液中での、二点鎖線ｄは同じく0.2重量％
加えたASTM液中での、三点鎖線ｅは同じく0.5重量％加
えたASTM液中での、それぞれ試験片の腐食量を表わして
いる。Further, in FIG. 2, the solid line a is in the ASTM solution containing no vanadium oxyacetylacetonate, and the dashed line b is the vanadium oxyacetylacetonate.
In an ASTM solution added with 02% by weight, a broken line c is the same as in an ASTM solution added with 0.05% by weight, and a two-dot chain line d is also 0.2% by weight in the same.
The three-dot chain line e in the added ASTM liquid represents the amount of corrosion of each test piece in the ASTM liquid also added with 0.5% by weight.
これら第１〜２図に記載した各線ａ〜ｄから明らかな
通り、ASTM液にバナジウムオキシアセチルアセトネート
を0.02〜0.5重量％加える事で、防錆剤としての役目を
十分に果たせる。As is clear from the respective lines a to d shown in FIGS. 1 and 2, by adding 0.02 to 0.5% by weight of vanadium oxyacetylacetonate to the ASTM solution, the role as a rust preventive agent can be sufficiently fulfilled.
又、本発明の防錆剤を含有した不凍液は、バナジウム
オキシアセチルアセトネートを0.02〜0.5重量％と、燐
酸塩を0.1〜3.0重量％と、安息香酸誘導体を2.5〜7.5重
量％と、チアゾールを0.1〜0.5重量％とを加える事によ
り構成されている。そして、PH値を7.0〜9.0としてい
る。更に必要に応じて0.1〜0.5重量％のアゾールを加え
る事で構成されている。Further, the antifreeze solution containing the anticorrosive of the present invention, vanadium oxyacetylacetonate 0.02-0.5 wt%, phosphate 0.1-3.0 wt%, benzoic acid derivative 2.5-7.5 wt%, and thiazole. It is composed by adding 0.1 to 0.5% by weight. The PH value is 7.0 to 9.0. Further, if necessary, 0.1 to 0.5% by weight of azole is added.
尚、好ましい燐酸塩は、第一燐酸水素ナトリウム、第
一燐酸水素カリウム、第二燐酸水素ナトリウム、第二燐
酸水素カリウム、燐酸水素二ナトリウム、燐酸水素二カ
リウムである。The preferred phosphates are sodium hydrogen phosphate, potassium hydrogen phosphate, sodium hydrogen phosphate dibasic, potassium hydrogen phosphate dibasic, disodium hydrogen phosphate and dipotassium hydrogen phosphate.
又、好ましい安息香酸誘導体は、安息香酸ナトリウ
ム、パラターシャリブチル安息香酸ソーダ、パラメチル
安息香酸、パライソプロピル安息香酸である。Further, preferable benzoic acid derivatives are sodium benzoate, sodium p-tert-butylbenzoate, para-methylbenzoic acid and para-isopropylbenzoic acid.
更に、好ましいチアゾールは、メルカプトベンゾチア
ゾールナトリウム塩、ベンゾチアゾール、トリルトリア
ゾールである。Further preferred thiazoles are mercaptobenzothiazole sodium salt, benzothiazole and tolyltriazole.
尚、不凍液とは、実際に自動車用のラジエータに注入
する溶液であって、凝固点を降下させる物質及び防錆剤
を含有した溶液を称する。The antifreeze solution is a solution that is actually injected into a radiator for an automobile, and refers to a solution containing a substance that lowers the freezing point and an anticorrosive agent.
（作用） 上述の様な組成を有する本発明の防錆剤と、この防錆
剤を含有した不凍液とは、例えば自動車用エンジンの冷
却水中に混入する事により、この冷却水が接触する金属
の防錆を図り、更に冷却水の凍結を防止する。特に本発
明の防錆剤は、比較的低濃度で、鉄や銅、真鍮だけでな
く、アルミニウム材の防錆も十分に図れ、更に長期間に
亙って冷却水の凍結防止効果が持続する。(Function) The rust preventive agent of the present invention having the composition as described above and the antifreeze solution containing the rust preventive agent are mixed with, for example, cooling water for an automobile engine to prevent the metal contacting with the cooling water. Prevent rust and prevent freezing of cooling water. Particularly, the rust preventive agent of the present invention has a relatively low concentration and can sufficiently prevent rust not only of iron, copper and brass but also of aluminum material, and the freezing prevention effect of the cooling water is maintained for a long period of time. .
即ち、防錆剤の主成分であるバナジウムオキシアセチ
ルアセトネートは、アルミニウム材の表面に、バナジウ
ムオキサイド（VO）の不動態皮膜、或はキレート化合物
を形成し、アルミニウム材表面に於ける腐食の発生を有
効に防止する。That is, vanadium oxyacetylacetonate, which is the main component of the rust preventive agent, forms a passivation film of vanadium oxide (VO) or a chelate compound on the surface of the aluminum material and causes corrosion on the surface of the aluminum material. Effectively prevent.
又、他の添加物、即ち、燐酸塩、安息香酸誘導体、チ
アゾール、アゾール（更には硝酸基）を添加する事によ
り、アルミニウム材に対する防食効果が向上するだけで
なく、鉄、或は銅系の合金等、アルミニウム以外の金属
に対する十分な防食効果が生じる。In addition, addition of other additives such as phosphates, benzoic acid derivatives, thiazoles, azoles (further nitric acid groups) not only improves the anticorrosion effect on aluminum materials but also improves the corrosion resistance of iron or copper-based materials. Sufficient anti-corrosion effect against metals other than aluminum such as alloys.
（実施例） 次に、本発明の技術的範囲に属する４種類の実施例及
び本発明の技術的範囲から外れる２種類の比較例に関
し、本発明者が行なった実験に就いて説明する。実験
は、それぞれが次の第１表に示す様な組成及びPH値を有
する６種類の不凍液に就いて腐食試験を行ない、次の第
２表に示す様な結果を得た。(Examples) Next, experiments performed by the present inventor will be described with respect to four types of examples belonging to the technical scope of the present invention and two types of comparative examples deviating from the technical scope of the present invention. In the experiment, six types of antifreeze solutions each having the composition and PH value shown in Table 1 below were subjected to a corrosion test, and the results shown in Table 2 below were obtained.
a.第一実施例 第１表に示す様に、バナジウムオキシアセチルアセト
ネートを0.02重量％と、安息香酸ナトリウムを5.0重量
％と、燐酸水素二カリウムを1.6重量％と、メルカプト
ベンゾチアゾールを0.5重量％とを添加した不凍液を、J
IS K 2234に定める金属腐食試験法により、672時間（４
週間）に亙る腐食試験に供した。 First Example As shown in Table 1, 0.02% by weight of vanadium oxyacetylacetonate, 5.0% by weight of sodium benzoate, 1.6% by weight of dipotassium hydrogen phosphate, and 0.5% by weight of mercaptobenzothiazole. % And added antifreeze, J
According to the metal corrosion test method defined in IS K 2234, 672 hours (4
It was subjected to a corrosion test for (week).
上記JIS K 2234に定める金属腐食試験法は、試験期間
中エチレングリコールが10〜30容量％含まれる様に、AS
TM（米国の自動車部品規格）に定める水で希釈して、各
種金属片の腐食量を測定するものである。The metal corrosion test method stipulated in JIS K 2234 above is such that the ethylene glycol content is 10 to 30% by volume during the test period.
The amount of corrosion of various metal pieces is measured by diluting with water specified by TM (American automobile part standard).
この腐食試験の期間中、供試片である金属片を浸漬し
た液体のPH値は、7.2〜8.6の間に保たれた。During the period of this corrosion test, the PH value of the liquid in which the metal piece as the test piece was immersed was maintained between 7.2 and 8.6.
この腐食試験の結果を第２表に示す。この第２表の、
ベース液の欄は、防錆剤を全く加えない液中に金属片を
浸漬した場合に於ける腐食量を表わしている。又、比較
例の欄は、Ａ、B2種類の市販品を液中に混入した場合に
於ける金属片の腐食量を表わしている。但し、市販品の
場合、試験中のPH値は、7.5〜9.0となった。The results of this corrosion test are shown in Table 2. In this second table,
The column of the base liquid represents the amount of corrosion when the metal piece is immersed in the liquid containing no rust inhibitor. Further, the column of Comparative Example shows the amount of corrosion of the metal pieces when two kinds of commercial products of A and B are mixed in the liquid. However, in the case of commercial products, the PH value during the test was 7.5 to 9.0.
この第２表に於いて、実施例１の欄と、ベース液及び
比較例の欄とを比較した場合、上記組成を有する不凍液
は、アルミニウム材製の鋳物（自動車のシリンダヘッド
に使用される場合が多い）、鋳鉄（自動車のシリンダブ
ロックに使用される場合が多い）、鋼、黄銅、半田、
銅、アルミニウム材（アルミニウム材としては、JIS 70
72クラッド材を使用した。鋼以下の金属は、熱交換器の
部品として多く使用される。）の何れに就いても、十分
な防食効果を発揮する事が解る。In Table 2, when the column of Example 1 is compared with the columns of the base liquid and the comparative example, the antifreeze solution having the above composition is a cast product made of an aluminum material (when it is used for a cylinder head of an automobile. , Cast iron (often used for automobile cylinder blocks), steel, brass, solder,
Copper, aluminum material (as aluminum material, JIS 70
72 clad material was used. Metals less than steel are often used as parts of heat exchangers. It can be seen that, regardless of which of the above), a sufficient anticorrosive effect is exhibited.
b.第二実施例 第１表に示す様に、バナジウムオキシアセチルアセト
ネートを0.05重量％と、安息香酸ナトリウムを5.0重量
％と、燐酸水素二カリウムを1.6重量％と、メルカプト
ベンゾチアゾールを0.5重量％とを添加した不凍液を、
上記第一実施例の場合と全く同じ条件で、JIS K 2234に
定める金属腐食試験法による、672時間（４週間）に亙
る腐食試験に供した。b. Second Example As shown in Table 1, 0.05% by weight of vanadium oxyacetylacetonate, 5.0% by weight of sodium benzoate, 1.6% by weight of dipotassium hydrogen phosphate and 0.5% by weight of mercaptobenzothiazole. % Antifreeze,
Under exactly the same conditions as in the case of the first embodiment, a corrosion test was carried out for 672 hours (4 weeks) by the metal corrosion test method specified in JIS K 2234.
この結果、第２表に示した様な結果が得られ、上記組
成を有する不凍液は、アルミニウム材製の鋳物、鋳鉄、
鋼、黄銅、半田、銅、アルミニウム材の何れに就いて
も、十分な防食効果を発揮する事が解った。As a result, the results shown in Table 2 were obtained, and the antifreeze solution having the above composition was used for casting of aluminum material, cast iron,
It was found that any of steel, brass, solder, copper, and aluminum can exert a sufficient anticorrosion effect.
c.第三実施例 第１表に示す様に、バナジウムオキシアセチルアセト
ネートを0.2重量％と、安息香酸ナトリウムを5.0重量％
と、燐酸水素二カリウムを1.6重量％と、メルカプトベ
ンゾチアゾールを0.5重量％とを添加した不凍液を、上
記第一実施例の場合と全く同じ条件で、JIS K 2234に定
める金属腐食試験法による、672時間（４週間）に亙る
腐食試験に供した。c. Third Example As shown in Table 1, 0.2% by weight of vanadium oxyacetylacetonate and 5.0% by weight of sodium benzoate.
And dipotassium hydrogen phosphate 1.6% by weight, mercaptobenzothiazole 0.5% by weight antifreeze solution, under exactly the same conditions as in the case of the first example, according to the metal corrosion test method defined in JIS K 2234, It was subjected to a corrosion test for 672 hours (4 weeks).
この結果、第２表に示した様な結果が得られ、上記組
成を有する不凍液は、アルミニウム材製の鋳物、鋳鉄、
鋼、黄銅、半田、銅、アルミニウム材の何れに就いて
も、十分な防食効果を発揮する事が解った。As a result, the results shown in Table 2 were obtained, and the antifreeze solution having the above composition was used for casting of aluminum material, cast iron,
It was found that any of steel, brass, solder, copper, and aluminum can exert a sufficient anticorrosion effect.
d.第四実施例 第１表に示す様に、バナジウムオキシアセチルアセト
ネートを0.5重量％と、安息香酸ナトリウムを5.0重量％
と、燐酸水素二カリウムを1.6重量％と、メルカプトベ
ンゾチアゾールを0.5重量％とを添加した不凍液を、上
記第一実施例の場合と全く同じ条件で、JIS K 2234に定
める金属腐食試験法による、672時間（４週間）に亙る
腐食試験に供した。d. Fourth Example As shown in Table 1, 0.5% by weight of vanadium oxyacetylacetonate and 5.0% by weight of sodium benzoate.
And dipotassium hydrogen phosphate 1.6% by weight, mercaptobenzothiazole 0.5% by weight antifreeze solution, under exactly the same conditions as in the case of the first example, according to the metal corrosion test method defined in JIS K 2234, It was subjected to a corrosion test for 672 hours (4 weeks).
この結果、第２表に示した様な結果が得られ、上記組
成を有する不凍液は、アルミニウム材製の鋳物、鋳鉄、
鋼、黄銅、半田、銅、アルミニウム材の何れに就いて
も、十分な防食効果を発揮する事が解った。As a result, the results shown in Table 2 were obtained, and the antifreeze solution having the above composition was used for casting of aluminum material, cast iron,
It was found that any of steel, brass, solder, copper, and aluminum can exert a sufficient anticorrosion effect.
（発明の効果） 本発明の防錆剤と、この防錆剤を含有した不凍液は、
以上に述べた様に、比較的低濃度でも、１種類の金属だ
けでなく複数種類の金属の防錆を有効に図る事ができ、
自動車の冷却水用だけでなく、各種機械の防錆、更には
凍結防止に果たす効果は大きい。(Effect of the invention) The rust preventive agent of the present invention and the antifreeze solution containing this rust preventive agent are
As described above, it is possible to effectively prevent rust not only for one kind of metal but also for plural kinds of metal even at a relatively low concentration.
Not only for cooling water for automobiles, but also for rust prevention of various machines, and also for freezing prevention.
第１図はバナジウムオキシアセチルアセトネートを加え
た場合に於ける電気化学的特性の変化を示す線図、第２
図はバナジウムオキシアセチルアセトネートを加えた場
合に於ける腐食量の変化を示す線図である。FIG. 1 is a diagram showing changes in electrochemical characteristics when vanadium oxyacetylacetonate is added, and FIG.
The figure is a diagram showing the change in the amount of corrosion when vanadium oxyacetylacetonate was added.
Claims (2)
0.02〜0.5重量％含む防錆剤。1. Vanadium oxyacetylacetonate
Anticorrosion agent containing 0.02 to 0.5% by weight.
0.02〜0.5重量％と、燐酸塩を0.1〜3.0重量％と、安息
香酸誘導体を2.5〜7.5重量％と、チアゾールを0.1〜0.5
重量％とを含有し、PH値を7.0〜9.0とした、防錆剤を含
有した不凍液。2. Vanadium oxyacetylacetonate
0.02 to 0.5% by weight, phosphate 0.1 to 3.0% by weight, benzoic acid derivative 2.5 to 7.5% by weight, and thiazole 0.1 to 0.5% by weight.
An antifreeze solution containing a rust preventive agent, which has a PH value of 7.0 to 9.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3803287A JPH0826465B2 (en) | 1987-02-23 | 1987-02-23 | Anti-corrosion agent and antifreeze containing this anti-corrosion agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3803287A JPH0826465B2 (en) | 1987-02-23 | 1987-02-23 | Anti-corrosion agent and antifreeze containing this anti-corrosion agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63206485A JPS63206485A (en) | 1988-08-25 |
| JPH0826465B2 true JPH0826465B2 (en) | 1996-03-13 |
Family
ID=12514213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3803287A Expired - Lifetime JPH0826465B2 (en) | 1987-02-23 | 1987-02-23 | Anti-corrosion agent and antifreeze containing this anti-corrosion agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0826465B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5448605A (en) * | 1993-10-29 | 1995-09-05 | General Electric Company | Palladium acetylacetonate solution and related method of manufacture |
| JP4214301B2 (en) * | 1999-04-02 | 2009-01-28 | シーシーアイ株式会社 | Anti-blackening agent and antifreeze / coolant composition using the same |
-
1987
- 1987-02-23 JP JP3803287A patent/JPH0826465B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63206485A (en) | 1988-08-25 |
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