JPS6353271B2 - - Google Patents
Info
- Publication number
- JPS6353271B2 JPS6353271B2 JP59019151A JP1915184A JPS6353271B2 JP S6353271 B2 JPS6353271 B2 JP S6353271B2 JP 59019151 A JP59019151 A JP 59019151A JP 1915184 A JP1915184 A JP 1915184A JP S6353271 B2 JPS6353271 B2 JP S6353271B2
- Authority
- JP
- Japan
- Prior art keywords
- added
- cooling water
- rust preventive
- amount
- rust
- 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
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
＜技術分野＞
本発明は、内燃機関用冷却水に添加して冷却水
系統の金属を防錆する防錆剤組成物に関する。
＜従来技術＞
一般に、冷却水が流通する内燃機関の冷却系統
は、金属材料としてアルミニウム鋳物、鋳鉄、
鋼、黄銅、はんだおよび銅で構成されており、一
方内燃機関の構成材料は主として鋳鉄とアルミニ
ウム合金とである。したがつて、内燃機関の冷却
水系統の防錆剤は、これらの多種類の金属の全て
に対して充分な防錆効果を有することが必要とさ
れる。従来、亜硝酸塩単独あるいは硝酸塩との混
合系にリン酸を加えた防錆剤があるが、この防錆
剤は、冷却水に添加した場合に激しくNOxが発
生して好ましくない。またリン酸に代えてメルカ
プトベンゾチアゾールのナトリウム塩を加えた防
錆剤もあるが、メルカプトベンゾチアゾールのナ
トリウム塩は高価であり、工業的利用には好まし
くない。
さらに前記のように内燃機関の主な構成材料
は、鋳鉄とアルミニウム合金とであり、冷却水に
よるそれらの腐食性が異なるために、それらに対
して同等の防錆効果を有する防錆剤でなければ、
内燃機関の主な構成材料によつて防錆剤を使い分
けなければならないという不都合が生じる。しか
しながら現在そのような内燃機関を構成する多種
の金属材料の全てに対し同時に充分な防錆効果を
発揮するような防錆剤はほとんどない。
また、冷却水系、なかんづくラジエータ部分に
おいては熱伝導性の良い銅や黄銅の細い部品で構
成されており、その接続続分をはんだ溶接するこ
とにより密閉構造を形成している。すなわち、は
んだはラジエータ部分にあつてはシール剤の役目
を果たしており、はんだが腐食されラジエータの
密閉構造が崩れると、内燃機関の冷却機能が失な
われることになる。
＜目的＞
本発明は、上述の点に鑑みて成されたものであ
つて、NOxを発生させることなく、安価に、内
燃機関の冷却水系統および内燃機関を構成する各
種金属材料を効果的に防錆する防錆剤組成物を提
供することを目的とする。
＜構成＞
本件発明者らは、上述の目的を達成するため
に、鋭意研究した結果、内燃機関の冷却水への添
加量が0.01〜2.0重量％であるベンゾトリアゾー
ルと水溶性アミンとの付加塩、前記冷却水への添
加量が0.03〜1.5重量％である亜硝酸塩、前記冷
却水への添加量が0.01〜0.5重量％である硝酸塩、
前記冷却水への添加量が0.01〜0.3重量％である
リン酸塩、前記冷却水への添加量が0.05〜1.0重
量％であるtert―ブチル安息香酸と水溶性アミン
との付加塩および前記冷却水への添加量が0.05〜
1.0重量％である安息香酸塩を含有する内燃機関
の冷却水用防錆剤組成物を見出し本発明を完成し
た。すなわち、本発明の防錆剤組成物を前記所定
の添加量になるように内燃機関の冷却水に添加す
ることによつて、NOxを発生させることなく内
燃機関を構成する多種類の金属材料を十分効果的
に防錆できることを見出した。
本発明に用いられるBT・SAは、ベンゾトリ
アゾールと水溶性アミンとを低温に加熱し反応さ
せることによりえられ、たとえば千代田化学研究
所製のＴ・228が用いられるが、ベンゾトリアゾ
ール、水溶性アミンをそれぞれ単独に用いてもよ
い。しかしながら、付加塩として用いることによ
つて、ベンゾトリアゾールの溶解度が上昇する。
水溶性アミンとしては、モノエタノールアミン、
ジエタノールアミン、トリエタノールアミン、シ
クロヘキシルアミン、イソプロピルアミンなどが
あげられる。BT・SAは、銅、黄銅に対する防
錆効果に優れており、その冷却水への添加量は、
0.01〜2.0％（重量％以下同様）であり、より好
ましくは0.05〜1.0％である。添加量が0.01％未満
であると銅、黄銅に対する防錆効果が劣り、逆に
２％を超えて添加すると防錆効果が飽和し不経済
であるとともに過剰の場合には冷却液相が暗褐色
となり、商品価値を低下させる結果となる。
本発明に用いられる亜硝酸塩としては亜硝酸ナ
トリウム、亜硝酸カリウムなどがあげられ、その
添加量は0.03〜1.5％であり、より好ましくは0.05
〜1.0％である。添加量が0.03％未満では、鋳鉄、
鋼に対する防錆効果が発揮されず、特に鋳鉄に対
して劣る、逆に1.5％を超えて添加しても防錆効
果の向上は見られない。
本発明に用いられる硝酸塩としては、硝酸ナト
リウム、硝酸カリウムなどがあげられ、その添加
量は0.01〜0.5％であり、より好ましくは0.05〜
0.3％である。この硝酸塩は、アルミニウム鋳物
に対して防錆効果有するが、その添加量が0.01％
未満では、アルミニウム鋳物に対する防錆効果が
劣り、逆に0.5％を超えて添加しても防錆効果の
向上は見られず、好ましくない。
本発明に用いられるリン酸塩としては、
NaH2PO4，KH2PO4などのリン酸二水素塩があ
げられ、その添加量は0.01〜0.3％であり、より
好ましくは0.02〜0.2％である。リン酸塩は、は
んだ、アルミニウムに対して特に防錆効果を有す
るが、鋳鉄、鋼に対しても防錆効果を有する。こ
のリン酸塩の添加量が0.01％未満では、アルミニ
ウム、はんだに対する防錆効果が劣り、逆に0.3
％を超えて添加すると、BT・SAおよびTBA・
SAを分解し、ベンゾトリアゾール、tert―ブチ
ル安息香酸の沈澱を生じ好ましくない。
本発明に用いられるTBA・SAは例えばtert―
ブチル安息香酸と水溶性アミンとを水またはイソ
プロピルアルコールに１：1.1のモル比で添加し
60〜70℃に加熱することにより得られる。または
溶媒を用いることなく、tert―ブチル安息香酸と
水溶性アミンとを直接混合してもよい。TBA・
SAは、はんだに対する防錆効果が優れており、
冷却水への添加量は、0.05〜1.0％であり、より
好ましくは、0.2〜0.5％である。添加量が0.05％
未満であるとはんだに対する防錆効果が劣り、逆
に1.0％を超えて添加しても防錆効果の向上は見
られない。
本発明に用いられる安息香酸塩としては、安息
香酸ナトリウム、安息香酸カリウムなどがあげら
れ、その添加量は0.05〜1.0％であり、より好ま
しくは0.2〜0.5％である。安息香酸塩は、はんだ
に対して優れた防錆効果を有し、リン酸塩、
TBA・SAとの混合系では、さらにその効果を発
揮する。安息香酸塩の添加量が0.05％未満では、
はんだに対する防錆効果が劣り、逆に1.0％を超
えて添加しても防錆効果の向上は見られない。
本発明に用いられる防錆剤組成物には、またホ
ウ酸塩を含有させてもよい。このホウ酸塩は、ナ
トリウム塩が好ましく防錆剤溶液の緩衝作用に預
かりPH変動を減少させる。このホウ酸塩の添加
量としては、0.001〜0.7％であり、この添加量が
0.001％未満であると防錆剤溶液の緩衝作用が劣
り、逆に0.7％を超えるととくに鋳鉄に対する防
錆効果が阻害されるとともに、緩衝作用が飽和し
てしまう。
＜効果＞
以上説明したように本発明に用いられる防錆剤
組成物は、銅、黄銅に対して優れた防錆効果を有
するBT・SA、アルミニウム鋳物、はんだに対
し優れた防錆効果を有するTBA・SAおよびリン
酸塩と亜硝酸塩を含有しており、これによつては
んだを初めとする多種の金属材料に防錆効果を有
する。したがつて、本発明の内燃機関の冷却水用
防錆剤組成物は、内燃機関および内燃機関の冷却
系統、なかんづく、ラジエータに対して有効に適
用しうる。さらに、本発明の防錆剤組成物は、エ
チレングリコール等の凍結防止剤がすべに混入し
ている冷却系統に対しても加ら問題なく適用する
ことができる。
＜実施例＞
以下、参考例、実施例および比較例によつて本
発明を更に詳細に説明するが、これらの実施例
は、いかなる意味でも本発明を限定するものでは
ない。
（参考列１〜７，15，16，実施例８〜14）
１の蒸留水に硫酸ナトリウム148mg、塩化ナ
トリウム165mgおよび炭酸水素ナトリウム138mgを
溶解し、ついで第１表に示す添加量（単位重量
％）に従つて防錆剤成分を添加することによつて
JISK2408に規定する試験液を作製した。
<Technical Field> The present invention relates to a rust preventive composition that is added to cooling water for an internal combustion engine to prevent metals in the cooling water system from rusting. <Prior art> In general, the cooling system of an internal combustion engine through which cooling water flows is made of metal materials such as aluminum castings, cast iron,
It is composed of steel, brass, solder and copper, while the construction materials of internal combustion engines are mainly cast iron and aluminum alloys. Therefore, a rust preventive agent for the cooling water system of an internal combustion engine is required to have a sufficient rust preventive effect on all of these various types of metals. Conventionally, there are rust preventive agents that include nitrite alone or a mixture with nitrate and phosphoric acid, but when added to cooling water, this rust preventive agent generates a large amount of NOx, which is undesirable. There is also a rust preventive agent in which a sodium salt of mercaptobenzothiazole is added instead of phosphoric acid, but the sodium salt of mercaptobenzothiazole is expensive and is not suitable for industrial use. Furthermore, as mentioned above, the main constituent materials of internal combustion engines are cast iron and aluminum alloy, and since the corrosiveness of these materials by cooling water differs, a rust preventive agent must have an equivalent rust preventive effect on them. Ba,
This creates the inconvenience of having to use different rust inhibitors depending on the main constituent materials of the internal combustion engine. However, at present, there are almost no rust preventives that simultaneously exhibit sufficient rust preventive effects on all of the various metal materials that constitute such internal combustion engines. The cooling water system, especially the radiator, is made of thin copper or brass parts with good thermal conductivity, and the connections are soldered to form a sealed structure. That is, the solder serves as a sealant in the radiator portion, and if the solder corrodes and the radiator's sealing structure collapses, the cooling function of the internal combustion engine will be lost. <Purpose> The present invention has been made in view of the above-mentioned points, and it is possible to effectively improve the cooling water system of an internal combustion engine and various metal materials constituting the internal combustion engine at low cost without generating NOx. An object of the present invention is to provide a rust preventive composition that prevents rust. <Structure> In order to achieve the above-mentioned object, the inventors of the present invention have conducted extensive research and found that an addition salt of benzotriazole and a water-soluble amine is added to the cooling water of an internal combustion engine in an amount of 0.01 to 2.0% by weight. , nitrites added in an amount of 0.03 to 1.5% by weight to the cooling water, nitrites added in an amount of 0.01 to 0.5% by weight to the cooling water,
A phosphate salt added to the cooling water in an amount of 0.01 to 0.3% by weight, an addition salt of tert-butylbenzoic acid and a water-soluble amine added in an amount of 0.05 to 1.0% by weight to the cooling water, and the cooling The amount added to water is 0.05~
The present invention was completed by discovering a rust preventive composition for cooling water of an internal combustion engine containing 1.0% by weight of benzoate. That is, by adding the rust preventive composition of the present invention to the cooling water of an internal combustion engine in the predetermined amount, it is possible to improve the quality of various metal materials that make up the internal combustion engine without generating NOx. It has been found that rust can be prevented effectively. BT/SA used in the present invention is obtained by heating benzotriazole and a water-soluble amine to a low temperature and reacting it; for example, T-228 manufactured by Chiyoda Chemical Research Institute is used; may be used individually. However, by using it as an addition salt, the solubility of benzotriazole is increased.
Water-soluble amines include monoethanolamine,
Examples include diethanolamine, triethanolamine, cyclohexylamine, and isopropylamine. BT/SA has excellent rust prevention effects on copper and brass, and the amount added to cooling water is as follows:
It is 0.01 to 2.0% (the same applies below weight %), and more preferably 0.05 to 1.0%. If the amount added is less than 0.01%, the rust preventive effect on copper and brass will be poor, and if it is added in excess of 2%, the rust preventive effect will be saturated and it will be uneconomical, and if it is in excess, the cooling liquid phase will turn dark brown. This results in a decrease in product value. Examples of the nitrite used in the present invention include sodium nitrite and potassium nitrite, and the amount added is 0.03 to 1.5%, more preferably 0.05%.
~1.0%. If the amount added is less than 0.03%, cast iron,
It does not have a rust-preventing effect on steel, and is particularly inferior to cast iron.Conversely, even if it is added in excess of 1.5%, no improvement in the rust-preventing effect is seen. Examples of the nitrate used in the present invention include sodium nitrate and potassium nitrate, and the amount added is 0.01 to 0.5%, more preferably 0.05 to 0.5%.
It is 0.3%. This nitrate has a rust preventive effect on aluminum castings, but the amount added is 0.01%.
If it is less than 0.5%, the rust preventive effect on aluminum castings will be poor, and on the other hand, if it is added in excess of 0.5%, no improvement in the rust preventive effect will be seen, which is not preferable. As the phosphate used in the present invention,
Dihydrogen phosphate salts such as NaH 2 PO 4 and KH 2 PO 4 are mentioned, and the amount added is 0.01 to 0.3%, more preferably 0.02 to 0.2%. Phosphates have a rust-preventing effect particularly on solder and aluminum, but also on cast iron and steel. If the amount of phosphate added is less than 0.01%, the rust prevention effect on aluminum and solder will be poor;
If added in excess of %, BT/SA and TBA/
It decomposes SA and causes precipitation of benzotriazole and tert-butylbenzoic acid, which is undesirable. The TBA/SA used in the present invention is, for example, tert-
Butylbenzoic acid and a water-soluble amine are added to water or isopropyl alcohol in a molar ratio of 1:1.1.
Obtained by heating to 60-70°C. Alternatively, tert-butylbenzoic acid and a water-soluble amine may be directly mixed without using a solvent. TBA・
SA has an excellent anti-corrosion effect on solder,
The amount added to cooling water is 0.05 to 1.0%, more preferably 0.2 to 0.5%. Addition amount is 0.05%
If it is less than 1.0%, the rust preventive effect on solder will be poor, and conversely, if it is added in excess of 1.0%, no improvement in the rust preventive effect will be seen. Examples of the benzoate used in the present invention include sodium benzoate and potassium benzoate, and the amount added is 0.05 to 1.0%, more preferably 0.2 to 0.5%. Benzoate has an excellent anti-rust effect on solder, and phosphate,
In a mixed system with TBA/SA, the effect is even more pronounced. If the amount of benzoate added is less than 0.05%,
The rust-preventing effect on solder is poor, and on the contrary, no improvement in the rust-preventing effect is seen even when added in excess of 1.0%. The rust preventive composition used in the present invention may also contain a borate. The borate is preferably a sodium salt, which reduces pH fluctuations due to the buffering effect of the rust preventive solution. The amount of borate added is 0.001 to 0.7%;
If it is less than 0.001%, the buffering effect of the rust preventive solution will be poor, and if it exceeds 0.7%, the rust preventive effect, especially on cast iron, will be inhibited and the buffering effect will be saturated. <Effect> As explained above, the rust preventive composition used in the present invention has an excellent rust preventive effect on copper and brass, and has an excellent rust preventive effect on BT/SA, aluminum castings, and solder. Contains TBA/SA, phosphates and nitrites, which have a rust-preventing effect on various metal materials including solder. Therefore, the rust preventive composition for internal combustion engine cooling water of the present invention can be effectively applied to internal combustion engines and cooling systems of internal combustion engines, especially radiators. Furthermore, the rust preventive composition of the present invention can be applied without any problem to cooling systems that are completely mixed with antifreeze agents such as ethylene glycol. <Examples> The present invention will be explained in more detail below using reference examples, working examples, and comparative examples, but these examples do not limit the present invention in any way. (Reference columns 1 to 7, 15, 16, Examples 8 to 14) 148 mg of sodium sulfate, 165 mg of sodium chloride, and 138 mg of sodium hydrogen carbonate were dissolved in the distilled water of 1, and then the amounts added (unit weight %) shown in Table 1 were dissolved. ) by adding rust inhibitor components according to
A test solution specified in JISK2408 was prepared.
【表】
このようにして作製された試験液750mlをトー
ルビーカーに取り、試験片としてアルミニウム鋳
物はJISH5202に規定するAC2A、鋳鉄は
JISG3141に規定するSPCC―Ｂ、黄銅は
JISH3100に規定するC2680P、はんだはJISZ3282
に規定するH30Aおよび銅はJISH3100に規定す
るC1100Pを用いて以下JISK2408（1981）に従つ
て本発明の防錆剤組成物の防錆効果を評価した。
結果を第２表に示す。[Table] Take 750ml of the test solution prepared in this way into a tall beaker and use it as a test piece.
SPCC-B specified in JISG3141, brass is
C2680P specified in JISH3100, solder is JISZ3282
The rust preventive effect of the rust preventive composition of the present invention was evaluated in accordance with JISK2408 (1981) below using H30A as defined in JISH3100 and copper as C1100P as defined in JISH3100. The results are shown in Table 2.
【表】【table】
【表】【table】
【表】【table】
【表】
（比較例 １〜16）
第３表に示す防錆剤成分およびその添加量に従
つて、参考例１〜７，15，16、実施例８〜14と同
様に試験液を作製し、それらの防錆効果を評価し
た。ただし比較例11〜16においては、それぞれ市
販品Ａ〜Ｆを用いて従来の防錆剤の防錆効果の程
度を示した。
結果を第４表に示す。[Table] (Comparative Examples 1 to 16) Test solutions were prepared in the same manner as Reference Examples 1 to 7, 15, and 16 and Examples 8 to 14 according to the rust preventive components and their addition amounts shown in Table 3. , their anticorrosion effects were evaluated. However, in Comparative Examples 11 to 16, commercially available products A to F were used to demonstrate the degree of rust prevention effect of conventional rust preventive agents. The results are shown in Table 4.
【表】【table】
【表】【table】
【表】
これらの表を参照して、参考例１〜３は各種の
BT・SAの防錆効果を示し、比較例５と比べる
ことによつて、BT・SAが銅および黄銅に対し
て防錆効果を有することが判る。参考例４〜５
は、各種TBA・SAの防錆効果を示し、比較例２
と比べることによつて、TBA・SAがはんだに対
して防錆効果を有していることが判る。参考例
７、実施例８〜12は、防錆剤成分の添加量の違い
による影響を示しており、実施例13，14，参考例
15は、TBA・SAと安息香酸塩の併用効果を示し
ている。比較例３〜５は、それぞれ亜硝酸ナトリ
ウム、硝酸ナトリウム、TBA・SAの効果を示し
ている。
なお、第２表、第３表には、JISK2408（1981）
の規定値を併せて掲げている。[Table] Referring to these tables, Reference Examples 1 to 3 are
By showing the rust preventive effect of BT/SA and comparing it with Comparative Example 5, it can be seen that BT/SA has a rust preventive effect on copper and brass. Reference examples 4-5
shows the rust prevention effect of various TBA/SA, Comparative Example 2
By comparing with , it can be seen that TBA/SA has a rust-preventing effect on solder. Reference Example 7 and Examples 8 to 12 show the effects of different amounts of rust preventive components added, and Examples 13 and 14 and Reference Examples
15 shows the combined effect of TBA/SA and benzoate. Comparative Examples 3 to 5 show the effects of sodium nitrite, sodium nitrate, and TBA/SA, respectively. In addition, Tables 2 and 3 include JISK2408 (1981)
The specified values are also listed.
Claims (1)
であつて、 前記冷却水への添加量が0.01〜2.0重量％であ
るベンゾトリアゾールと水溶性アミンとの付加
塩、 前記冷却水への添加量が0.03〜1.5重量％であ
る亜硝酸塩、 前記冷却水への添加量が0.01〜0.5重量％であ
る硝酸塩、 前記冷却水への添加量が0.01〜0.3重量％であ
るリン酸塩、 前記冷却水への添加量が0.05〜1.0重量％であ
るtert―ブチル安息香酸と水溶性アミンとの付加
塩および 前記冷却水への添加量が、0.05〜1.0重量％で
ある安息香酸塩を含有することを特徴とする内燃
機関の冷却水用防錆剤組成物。[Scope of Claims] 1. A rust preventive composition added to cooling water of an internal combustion engine, the addition salt of benzotriazole and a water-soluble amine being added to the cooling water in an amount of 0.01 to 2.0% by weight. , nitrites added in an amount of 0.03 to 1.5% by weight to the cooling water, nitrates added in an amount of 0.01 to 0.5% by weight to the cooling water, and nitrites added in an amount of 0.01 to 0.3% by weight to the cooling water. a phosphate, an addition salt of tert-butylbenzoic acid and a water-soluble amine, the amount added to the cooling water is 0.05 to 1.0% by weight; and the amount added to the cooling water is 0.05 to 1.0% by weight. A rust preventive composition for cooling water of an internal combustion engine, characterized by containing a benzoate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1915184A JPS60162785A (en) | 1984-02-03 | 1984-02-03 | Rust inhibitor composition for internal combustion engine cooling water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1915184A JPS60162785A (en) | 1984-02-03 | 1984-02-03 | Rust inhibitor composition for internal combustion engine cooling water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60162785A JPS60162785A (en) | 1985-08-24 |
| JPS6353271B2 true JPS6353271B2 (en) | 1988-10-21 |
Family
ID=11991425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1915184A Granted JPS60162785A (en) | 1984-02-03 | 1984-02-03 | Rust inhibitor composition for internal combustion engine cooling water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60162785A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61149489A (en) * | 1984-12-25 | 1986-07-08 | Tatsuta Electric Wire & Cable Co Ltd | Corrosion inhibitor composition |
| US6982062B2 (en) * | 2003-07-22 | 2006-01-03 | Ashland Inc. | Corrosion inhibiting composition |
| ES2592158T3 (en) * | 2009-06-02 | 2016-11-28 | Nippon Steel & Sumitomo Metal Corporation | Photocurable composition suitable for the prevention of rust from a threaded joint for steel pipes |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5456041A (en) * | 1977-10-01 | 1979-05-04 | Otsuka Chem Co Ltd | Metal corrosion preventing composition |
-
1984
- 1984-02-03 JP JP1915184A patent/JPS60162785A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60162785A (en) | 1985-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5366651A (en) | Corrosion-inhibited antifreeze formulations having monocarboxylic, triazole, and imidazole compounds | |
| US4759864A (en) | Corrosion-inhibited antifreeze formulation | |
| US4588513A (en) | Non-borate, non-phosphate antifreeze formulations containing dibasic acid salts as corrosion inhibitors | |
| EP0251480B1 (en) | Corrosion-inhibited antifreeze/coolant composition | |
| JPH02182782A (en) | Heat transfer fluid containing dicarboxylic acid mixture as corrosion inhibitor | |
| US4587028A (en) | Non-silicate antifreeze formulations | |
| US5387360A (en) | Engine antifreeze coolant composition | |
| US6045719A (en) | Use of quaternized imidazoles as corrosion inhibitors for non-ferrous metals, and coolant compositions and antifreeze concentrates comprising them | |
| JPH1067982A (en) | Nonfreezing concentrate containing no silicate, borate and nitrate and readily applicable cooling composition containing the same | |
| US5422026A (en) | Phosphate-free antifreeze formulation | |
| EP0552988B1 (en) | Antifreeze composition | |
| JPH05339562A (en) | Phosphate containing, glycol-based coolant mixture | |
| EP0479471B1 (en) | Corrosion-inhibited antifreeze/coolant composition containing cyclohexane acid | |
| JP3941030B2 (en) | Low phosphorus coolant composition | |
| US5240631A (en) | Antifreeze formulation containing phosphorous acid | |
| US4584119A (en) | Naphthalene dicarboxylic acid salts as corrosion inhibitors | |
| US4592853A (en) | Dicyclopentadiene dicarboxylic acid salts as corrosion inhibitors | |
| US4414126A (en) | Aqueous compositions containing corrosion inhibitors for high lead solder | |
| JP2772578B2 (en) | antifreeze | |
| JPS59208082A (en) | Corrosion prevention method for metals in cooling water systems | |
| JPS6353271B2 (en) | ||
| JPH0119472B2 (en) | ||
| CZ183598A3 (en) | Antifreeze | |
| JPH031355B2 (en) | ||
| JPH0149393B2 (en) |