JP2843934B2 - Water soluble rust preventive composition - Google Patents

Water soluble rust preventive composition

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Publication number
JP2843934B2
JP2843934B2 JP61252388A JP25238886A JP2843934B2 JP 2843934 B2 JP2843934 B2 JP 2843934B2 JP 61252388 A JP61252388 A JP 61252388A JP 25238886 A JP25238886 A JP 25238886A JP 2843934 B2 JP2843934 B2 JP 2843934B2
Authority
JP
Japan
Prior art keywords
rust
composition
rust preventive
acid
present
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 - Fee Related
Application number
JP61252388A
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Japanese (ja)
Other versions
JPS63105983A (en
Inventor
和則 福村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Otsuka Chemical Co Ltd
Original Assignee
Otsuka Chemical Co Ltd
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Filing date
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Priority to JP61252388A priority Critical patent/JP2843934B2/en
Publication of JPS63105983A publication Critical patent/JPS63105983A/en
Application granted granted Critical
Publication of JP2843934B2 publication Critical patent/JP2843934B2/en
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Expired - Fee Related legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23FNON-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
    • C23F11/00Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/08Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
    • C23F11/10Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors

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  • 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 本発明は、水溶性防錆組成物に関し、その目的とする
ところは常温から高温度領域 (200〜250℃)の使用に供し得る優れた防錆性能を有
し、金属表面の外観悪化を起こさない防錆組成物を提供
することにある。 従来の技術及びその問題点 従来、防錆剤に用いられる素材又は化合物に関して数
多くの提案が行なわれていると共に、実用に供されてき
たものも多く、使用する目的に応じて(1)油性タイ
プ、所謂防錆油及び(2)水溶性タイプに大別されてい
る。 これら防錆剤は、適用される環境が一般的に30〜50℃
までの大気腐食に関するものである。一部の分野では70
〜80℃、或いは100℃を越える場合の防錆処理も行なわ
れているものの、200℃に及ぶ高温度領域に対して実用
に供されている防錆剤、特に水溶性防錆剤は見当たらな
い。 例えば金属の熱処理分野では、焼入に油を用いた場
合、焼入油を脱脂した後、焼戻処理が行なわれ、金属素
材は160〜200℃、或いはそれ以上の高温にさらされる。
そのため金属表面の乾燥が十分でなければ、また完全に
乾燥されたとしても腐食性を有する環境下では、焼戻処
理の際に錆の発生が認められることが多い。それにもか
かわらず、焼戻処理の際における防錆処理は殆んど行な
われておらず、熱処理素材の焼戻後にブラスト処理等の
加工をし、その後必要に応じて室温下で一般の防錆剤で
防錆処理をしているのが現状である。この理由は、以下
の通りである。即ち、常温下で使用される一般の防錆剤
を前記高温度における防錆処理に適用した場合、充分な
防錆効果が発揮され得ないことが多く、またある程度の
防錆性を賦与できたとしても、金属表面の外観の悪化、
即ち変色(ステイン)、焼付等の発生は避け得ない。更
に金属表面に凹凸部がある素材では、水切り、乾燥が充
分でないと、高温度で防錆処理液による残存固形物の
跡、水滴のシミ等が大きく残り、満足な仕上りが期待で
きない等の欠点が現われ、金属表面の外観を問題視する
場合には、再加工が余儀なくされるため、従来から防錆
剤の使用を次工程で行なわざるを得なかったのである。 また、プラスチック等の金型成形分野においても、プ
ラスチックの溶融温度150〜250℃では、上記金属の熱処
理の場合と同様に金型に対する防錆性が要求されるが、
斯かる防錆性能を発現し得る防錆剤は未だ存在せず、更
に金型表面の外観悪化、変色、焼付等の発生等の問題も
有している。 このように、熱処理分野、プラスチック等の金型成形
分野、その他高温度の下で金属を加工する分野では、高
温度の作用に供し得る防錆剤の要望が強いにも拘らず、
従来の防錆剤では満足できる効果が得られていないのが
現状である。 問題点を解決するための手段 本発明者は、斯かる現状に鑑み、高温度の使用に供し
得る防錆剤の開発に努めた結果、下記特定成分を配合し
た組成物が本発明の所期の目的を達成し得ることを見い
出した。本発明は、斯かる知見に基づいて完成されたも
のである。 即ち、本発明は、 (A) 一般式 〔式中R1及びR2は、同一又は異なって水素原子、アルキ
ル基、ニトロ基、アミノ基又は水酸基を示し、nは1〜
3の整数を示す。〕 で表わされる安息香酸誘導体及び一般式 〔式中R1、R2及びnは前記に同じ。〕 で表わされるナフチル酸誘導体からなる群から選ばれた
少なくとも1種、 (B)ベンゾトリアゾール類、ベンゾチアゾール類、イ
ミダゾール類及びピラゾール類からなる群から選ばれた
少なくとも1種、 (C)アルカノールアミン、並びに (D)界面活性剤 を含有し、pHが7〜11の範囲にある水溶性防錆組成物に
係る。 本発明において(A)成分として用いられる上記一般
式(1)の安息香酸誘導体としては、上記一般式(1)
に該当するものである限り従来公知のものを広く使用で
き、例えば安息香酸、フタル酸、トリメリット酸、トル
イル酸、クミン酸、p−tert−ブチル安息香酸、ニトロ
安息香酸、ニトロフタル酸、アミノ安息香酸、ヒドロキ
シ安息香酸、p−ジメチルアミノ安息香酸、2−ヒドロ
キシ−m−トルイル酸、2,4−ジニトロ安息香酸、3−
メチル−4−ニトロ安息香酸等を挙げることができる。
また上記一般式(2)のナフチル酸誘導体としては、上
記一般式(2)に該当するものである限り従来公知のも
のを広く使用でき、例えばナフタル酸、ヒドロキシナフ
トエ酸、ナフチル酸、サリチル酸、5−ニトロサリチル
酸等を挙げることができる。これらは1種単独で又は2
種以上混合して使用され得る。 本発明において(B)成分として用いられるベンゾト
リアゾール類、ベンゾチアゾール類、イミダゾール類及
びピラゾール類としては、従来公知のものを広く使用で
きる。具体的にはベンゾトリアゾール類としては、ベン
ゾトリアゾール、トリルトリアゾール、2−(2′−ヒ
ドロキシ−5′−メチルフエニル)ベンゾトリアゾー
ル、2−(2′−ヒドロキシ−3′,5′−ジ−tert−ブ
チルフエニル)ベンゾトリアゾール等やこれらのナトリ
ウム塩、カリウム塩等を、ベンゾチアゾール類として
は、メルカプトベンゾチアゾール、2−(4′−モルホ
リノジチオ)ベンゾチアゾール、N−シクロヘキシル−
2−ベンゾチアゾリルスルフエンアミド、N−オキシジ
エチレン−2−ベンゾチアゾリルスルフエンアミド、N
−tert−ブチル−2−ベンゾチアゾリルスルフエンアミ
ド等やこれらのナトリウム塩、カリウム塩等を、イミダ
ゾール類としては、メルカプトベンゾイミダゾール、2
−メルカプトメチルベンゾイミダゾール等やこれらのナ
トリウム塩、カリウム塩等を、またピラゾール類として
は、3−メチル−5−ピラゾロン、1,3−ジメチル−5
−ピラゾロン、3,5−ジメチルピラゾール、ピラゾー
ル、3−フエニル−5−ピラゾロン、3−メチル−5−
フエニルピラゾール、4−フエニルピラゾール等をそれ
ぞれ例示できる。これらは1種単独で又は2種以上混合
して使用され得る。 本発明において(C)成分として用いられるアルカノ
ールアミンとしては、従来公知のものを広く使用でき、
例えば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、イソプロパノールアミン、ジイソ
プロパノールアミン、トリイソプロパノールアミン、ア
ミノエチルエタノールアミン、コリン等を挙げることが
でき、これらは1種単独で又は2種以上混合して使用さ
れ得る。 本発明においては、上記(A)成分、(B)成分及び
(C)成分を次のような割合で配合するのが望ましい。
(A)成分は、本発明の組成物中に 1×10-3〜1モル%程度、特に2×10-3〜1×10-1モル
%程度含有させるのが好ましい。(A)成分の配合量が
上記範囲より少ないと、その使用濃度において鋼や特殊
鋼に対する防錆性能が劣る傾向となり、また逆に(A)
成分の配合量が上記範囲より多くなると、該組成物を使
用した場合に金属表面にムラに固形物が残存したり、場
合によっては変色の発生が認められる傾向が生ずるの
で、好ましくない。また(B)成分は、本発明の組成物
中に5×10-4〜1モル%程度、特に1×10-3〜1×10-1
モル%程度含有させるのが好ましい。(B)成分の配合
量が上記範囲より少ないと、金属表面の変色防止が困難
になる傾向が生じ、また逆に(B)成分の配合量が上記
範囲より多くなると、金属表面に固形残渣がムラに残存
する傾向となるので、好ましくない。(C)成分は、本
発明の組成物のpHが7〜11、好ましくは8〜9.5程度と
なるように、本発明組成物中に配合するのがよい。本発
明組成物のpHが上記範囲を逸脱する場合には、鋼や特殊
鋼に対する防錆性能が大きく低下したり、防錆組成物の
一部が劣化したり、場合によっては該組成物が不溶性に
なることがあり、不都合である。 本発明の防錆組成物は、通常水溶液又はエマルジョン
の形態で使用に供される。エマルジョンの形態の本発明
組成物を調製するに際しては、界面活性剤(D成分)を
用いて上記各成分を水に分散させればよい。界面活性剤
としては、従来公知のものを広く使用でき、その代表的
なものとしてポリオキシエチレンアルキルエーテル、ポ
リオキシエチレンアルキルフエニルエーテル、イミダゾ
リン系両性界面活性剤、ポリオキシエチレンアルキルア
ミン等を例示できる。界面活性剤の添加により、得られ
る防錆組成物の防錆性及び洗浄性を向上させることがで
きるという利点がある。 本発明の防錆組成物の使用に際しては、該組成物に水
や他の溶媒(例えばエチレングリコール、イソプロピル
アルコール、エチルアルコール等)を添加して使用して
もよいが、管理の面から予め適当量の水又は他の溶媒に
溶解して製剤化しておき(通常は10〜20%の水溶液とす
る)、使用時にこれをそのまま又は50倍程度までに希釈
して用いるのがよい。 発明の効果 本発明の防錆組成物は、常温での使用は言うに及ば
ず、200〜250℃に及ぶ高温度領域においても優れた防錆
性を発現し得ると共に、適用される金属又は加工品の外
観に変色、焼付等を発生させず、また金属表面に凹凸部
がある素材に対しても防錆処理液による残存固形物の
跡、シミ等を残さないものである。 実施例 以下に実施例及び比較例を掲げて本発明をより一層明
らかにする。 比較例A 防錆組成物の各成分が下記第1表に示された濃度にな
るように水に希釈してサンプルNo.1〜5を調製した。斯
くして得られる各防錆組成物に、清浄化された試験材
〔クロム鋼板、50×100mm、厚さ5mm〕を浸漬し、その後
直ちに該組成物の水蒸気で満たされた温度200〜250℃の
電気炉内に2〜4時間放置した後、取り出して室温で7
日間屋内暴露し、試験材の外観及び防錆性能を調べた。
結果を下記第2表に示す。 比較例B 防錆組成物の各成分が下記第1表に示された濃度にな
るように水に希釈してサンプルNo.I〜IIを調製した。ま
た公知の防錆剤との性能を比較するため、公知の各防錆
剤(イ)〔脂肪族モノカルボン酸10%及びモノエタノー
ルアミン10%を含有〕、(ロ)〔石油系スルホン酸5
%、鉱物油10%及びトリエタノールアミン10%を含有〕
及び(ハ)〔亜硝酸ソーダ10%及びトリエタノールアミ
ン2%を含有〕をそれぞれ水で20倍に希釈してサンプル
No.III、IV、Vを調製した。以下比較例Aと同様にして
試験材の外観及び防錆性能を調べた。結果を下記第2表
に併せて示す。 尚、下記第1表における(C)成分は、得られる防錆
組成物のpHが7〜10の範囲内になるように使用した。ジ
エタノールアミンとモノイソプロパノールアミンとを併
用する場合、その使用割合は等モル濃度とした。またト
リエタノールアミンとトリイソプロパノールアミンとを
併用する場合、その使用割合は等モル濃度とした。 上記第2表において、各記号は以下の判定基準従って
評価したものである。尚、第3表においても同じであ
る。 ◎:全く変化なし ○:軽微な変化あり △:変化の程度少 ×:変化の程度大 実施例1 サンプルNo.1〜5の組成物に界面活性剤〔非イオン
性、商品名リポノックス、ライオン社製〕をそれぞれ0.
3%添加して、サンプルNo.6〜10の本発明組成物を調製
した。また比較のために、サンプルNo.I〜Vの防錆組成
物に上記界面活性剤をそれぞれ0.3%添加して、サンプ
ルNo.I′〜V′の防錆組成物を調製した。 斯くして得られる各防錆組成物に、焼入油により熱処
理された試験材〔クロム鋼板、50×100mm、厚さ5mm〕を
浸漬し、脱脂した後直ちに該組成物の水蒸気で満たされ
た温度200〜250℃の電気炉内に2〜4時間放置した後、
取り出して室温で7日間屋内暴露し、試験材の外観及び
防錆性能を調べた。結果を下記第3表に示す。実施例2 上記実施例1で調製したサンプルNo.6〜10の本発明組
成物に試験材〔クロム鋼板、50×100mm、厚さ5mm〕を浸
漬した後室温で7日間屋内暴露し、防錆性能を調べた。
結果を下記第4表に示す。 上記第4表において、各記号は以下の判定基準従って
評価したものである。 ◎:全く変化なし ×:多量の錆が認められた 実施例3 防錆組成物の各成分が下記第5表に示された濃度にな
るように水に希釈してサンプル11(本発明組成物)及び
12(比較組成物)を調製した。なお、ジエタノールアミ
ンは、サンプルのpHが8となる量を加えた。 これらサンプル11及び12に、洗浄化された試験材(ク
ロム鋼板、50×100mm、厚さ5mm)を浸漬し、その後直ち
に水蒸気で満たされた温度200〜250℃の電気炉内に3時
間放置した後、取り出して室温で30日間屋内暴露し、7
日目と30日目の試験材の防錆性及び外観を観察した。7
日目の観察結果を下記第6表に、30日目の観察結果を下
記第7表に示す。 上記第6表及び第7表において、各記号は以下の判定
基準に従って評価したものである。 ◎:全く変化無し △:変化の程度少 ×:変化の程度大
Description: FIELD OF THE INVENTION The present invention relates to a water-soluble rust-preventive composition, and an object of the present invention is to provide an excellent rust-preventive composition which can be used in a temperature range from normal temperature to high temperature (200 to 250 ° C.). An object of the present invention is to provide a rust preventive composition which has performance and does not cause deterioration in appearance of a metal surface. 2. Description of the Related Art Conventional Techniques and Problems There have been many proposals for materials or compounds used in rust inhibitors, and many of them have been put to practical use. Rust-preventive oils and (2) water-soluble types. The environment in which these rust inhibitors are applied is generally 30-50 ° C.
Up to atmospheric corrosion. 70 in some areas
Although rust prevention treatment is carried out when the temperature exceeds ~ 80 ° C or 100 ° C, no rust preventives, especially water-soluble rust preventives, practically used for high temperature range up to 200 ° C are found. . For example, in the field of metal heat treatment, when oil is used for quenching, a tempering treatment is performed after the quenching oil is degreased, and the metal material is exposed to a high temperature of 160 to 200 ° C. or more.
For this reason, if the metal surface is not sufficiently dried, or even if it is completely dried, in an environment having corrosiveness, rust is often observed during tempering. Nevertheless, almost no rust-prevention treatment has been performed during the tempering treatment. After the tempering of the heat-treated material, processing such as blasting is performed, and if necessary, general rust-prevention treatment is performed at room temperature. At present, anti-corrosion treatment is carried out with chemicals. The reason is as follows. That is, when a general rust preventive used at normal temperature is applied to the rust preventive treatment at the high temperature, a sufficient rust preventive effect cannot often be exerted, and a certain degree of rust preventive property can be imparted. As well as deterioration of the appearance of the metal surface,
That is, the occurrence of discoloration (stain) and seizure cannot be avoided. Furthermore, in the case of a material that has irregularities on the metal surface, if draining and drying are not sufficient, traces of residual solids due to the rust-preventive treatment liquid at high temperatures, stains of water droplets, etc. will remain largely, and a satisfactory finish cannot be expected. When the appearance of the metal surface is regarded as a problem, rework is unavoidable, so that the use of a rust inhibitor has conventionally been required in the next step. Also, in the field of mold molding of plastics and the like, at a melting temperature of the plastic of 150 to 250 ° C., rust prevention for the mold is required as in the case of the heat treatment of the metal,
There is no rust preventive agent capable of exhibiting such rust preventive performance yet, and there are also problems such as deterioration of the appearance of the mold surface, discoloration, and seizure. Thus, in the field of heat treatment, the field of metal molding such as plastics, and the field of processing metals under high temperatures, despite the strong demand for rust inhibitors capable of providing high-temperature action,
At present, satisfactory effects cannot be obtained with conventional rust preventives. Means for Solving the Problems In view of the present situation, the present inventor has worked on the development of a rust inhibitor that can be used at a high temperature. It has been found that the objective of the invention can be achieved. The present invention has been completed based on such knowledge. That is, the present invention provides: Wherein R 1 and R 2 are the same or different and represent a hydrogen atom, an alkyl group, a nitro group, an amino group or a hydroxyl group, and n is 1 to
Indicates an integer of 3. A benzoic acid derivative represented by the general formula: Wherein R 1 , R 2 and n are the same as above. (B) at least one selected from the group consisting of benzotriazoles, benzothiazoles, imidazoles and pyrazoles; (C) alkanolamine And (D) a water-soluble rust preventive composition containing a surfactant and having a pH in the range of 7 to 11. The benzoic acid derivative of the above general formula (1) used as the component (A) in the present invention includes the above general formula (1)
Conventionally known ones can be widely used as long as they correspond to, for example, benzoic acid, phthalic acid, trimellitic acid, toluic acid, cumic acid, p-tert-butylbenzoic acid, nitrobenzoic acid, nitrophthalic acid, aminobenzoic acid Acid, hydroxybenzoic acid, p-dimethylaminobenzoic acid, 2-hydroxy-m-toluic acid, 2,4-dinitrobenzoic acid, 3-
Methyl-4-nitrobenzoic acid and the like can be mentioned.
As the naphthylic acid derivative represented by the general formula (2), conventionally known ones can be widely used as long as they correspond to the general formula (2). For example, naphthalic acid, hydroxynaphthoic acid, naphthic acid, salicylic acid, -Nitrosalicylic acid and the like. These may be used alone or 2
More than one species may be used in combination. As the benzotriazole, benzothiazole, imidazole and pyrazole used as the component (B) in the present invention, conventionally known ones can be widely used. Specifically, benzotriazoles include benzotriazole, tolyltriazole, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2- (2'-hydroxy-3 ', 5'-di-tert- And benzothiazoles such as mercaptobenzothiazole, 2- (4'-morpholinodithio) benzothiazole, N-cyclohexyl-
2-benzothiazolylsulfenamide, N-oxydiethylene-2-benzothiazolylsulfenamide, N
-Tert-butyl-2-benzothiazolylsulfenamide and the like, sodium salts and potassium salts thereof, and the like, as imidazoles, mercaptobenzimidazole,
-Mercaptomethylbenzimidazole and the like, sodium salts and potassium salts thereof, and pyrazoles such as 3-methyl-5-pyrazolone and 1,3-dimethyl-5.
-Pyrazolone, 3,5-dimethylpyrazole, pyrazole, 3-phenyl-5-pyrazolone, 3-methyl-5-
Examples thereof include phenylpyrazole and 4-phenylpyrazole. These can be used alone or in combination of two or more. As the alkanolamine used as the component (C) in the present invention, conventionally known alkanolamines can be widely used,
For example, monoethanolamine, diethanolamine, triethanolamine, isopropanolamine, diisopropanolamine, triisopropanolamine, aminoethylethanolamine, choline and the like can be mentioned, and these can be used alone or in combination of two or more. obtain. In the present invention, the components (A), (B) and (C) are desirably blended in the following proportions.
The component (A) is preferably contained in the composition of the present invention at about 1 × 10 −3 to 1 mol%, particularly at about 2 × 10 −3 to 1 × 10 −1 mol%. If the compounding amount of the component (A) is less than the above range, the rust-preventive performance against steel or special steel tends to be inferior at the use concentration, and conversely, the component (A)
If the compounding amount of the component is more than the above range, the use of the composition is not preferable because a solid substance remains unevenly on the metal surface, and in some cases, discoloration occurs. The component (B) is contained in the composition of the present invention in an amount of about 5 × 10 -4 to 1 mol%, particularly 1 × 10 -3 to 1 × 10 -1.
It is preferable to contain about mol%. If the amount of the component (B) is less than the above range, it tends to be difficult to prevent discoloration of the metal surface. Conversely, if the amount of the component (B) is more than the above range, a solid residue is formed on the metal surface. It is not preferable because it tends to remain in unevenness. The component (C) is preferably incorporated into the composition of the present invention so that the pH of the composition of the present invention is 7 to 11, preferably about 8 to 9.5. When the pH of the composition of the present invention deviates from the above range, the rust-preventive performance on steel or special steel is greatly reduced, or a part of the rust-preventive composition is deteriorated, and in some cases, the composition is insoluble. This is inconvenient. The rust preventive composition of the present invention is usually used in the form of an aqueous solution or emulsion. In preparing the composition of the present invention in the form of an emulsion, the above components may be dispersed in water using a surfactant (component D). As the surfactant, conventionally known surfactants can be widely used, and typical examples thereof include polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, imidazoline amphoteric surfactant, and polyoxyethylene alkylamine. it can. By adding a surfactant, there is an advantage that the rust preventive property and the cleanability of the obtained rust preventive composition can be improved. When using the rust preventive composition of the present invention, water and other solvents (for example, ethylene glycol, isopropyl alcohol, ethyl alcohol, etc.) may be added to the composition and used. It is preferable to prepare a solution by dissolving it in an amount of water or another solvent (usually a 10 to 20% aqueous solution), and to use this as it is or by diluting it up to about 50 times. Effect of the Invention The rust-preventing composition of the present invention is not limited to use at room temperature, and can exhibit excellent rust-preventive properties even in a high temperature range of 200 to 250 ° C, and can be applied to metal or processing. It does not cause discoloration, seizure, etc. in the appearance of the product, and does not leave traces of residual solids, stains, etc. due to the rust preventive treatment liquid even on materials having irregularities on the metal surface. Examples Hereinafter, the present invention will be further clarified with reference to Examples and Comparative Examples. Comparative Example A Samples Nos. 1 to 5 were prepared by diluting each component of the rust preventive composition with water so as to have the concentrations shown in Table 1 below. In each of the rust preventive compositions thus obtained, a cleaned test material (chrome steel sheet, 50 × 100 mm, thickness 5 mm) is immersed, and immediately thereafter, the temperature of the composition filled with water vapor is 200 to 250 ° C. After leaving in an electric furnace for 2 to 4 hours, take out
After being exposed indoors for one day, the appearance and rust prevention performance of the test material were examined.
The results are shown in Table 2 below. Comparative Example B Samples Nos. I and II were prepared by diluting each component of the rust preventive composition with water so as to have the concentrations shown in Table 1 below. In order to compare the performance with known rust preventives, known rust preventives (a) [containing 10% of aliphatic monocarboxylic acid and 10% of monoethanolamine], (b) [petroleum sulfonic acid 5]
%, Mineral oil 10% and triethanolamine 10%]
And (c) [containing 10% of sodium nitrite and 2% of triethanolamine] were diluted 20 times with water, respectively.
Nos. III, IV and V were prepared. Thereafter, the appearance and rust prevention performance of the test material were examined in the same manner as in Comparative Example A. The results are shown in Table 2 below. The component (C) in Table 1 below was used so that the pH of the obtained rust preventive composition was in the range of 7 to 10. When diethanolamine and monoisopropanolamine are used in combination, the proportions used were equimolar. When triethanolamine and triisopropanolamine are used in combination, the proportions used were equimolar. In Table 2, each symbol is evaluated according to the following criteria. The same applies to Table 3. :: no change :: slight change △: small change ×: large change Example 1 A surfactant [nonionic, trade name Liponox, lion) was added to the compositions of Sample Nos. 1 to 5. Company).
By adding 3%, the compositions of the present invention of Sample Nos. 6 to 10 were prepared. For comparison, 0.3% of each of the above surfactants was added to the rust preventive compositions of Sample Nos. I to V to prepare rust preventive compositions of Sample Nos. I 'to V'. A test material (chrome steel plate, 50 × 100 mm, thickness 5 mm) heat-treated with quenching oil was immersed in each of the rust preventive compositions thus obtained, and immediately after being degreased, filled with the water vapor of the composition. After leaving in an electric furnace at a temperature of 200-250 ° C for 2-4 hours,
The sample was taken out and exposed indoors for 7 days at room temperature, and the appearance and rust prevention performance of the test material were examined. The results are shown in Table 3 below. Example 2 A test material (chromium steel plate, 50 × 100 mm, thickness 5 mm) was immersed in the composition of the present invention of Samples Nos. 6 to 10 prepared in Example 1 described above, and then exposed indoors at room temperature for 7 days to prevent rust. The performance was examined.
The results are shown in Table 4 below. In Table 4 above, each symbol was evaluated according to the following criteria. :: No change at all. ×: A large amount of rust was observed. Example 3 Sample 11 (the composition of the present invention) was diluted with water so that the components of the rust-preventive composition had the concentrations shown in Table 5 below. )as well as
12 (comparative composition) was prepared. Diethanolamine was added in such an amount that the pH of the sample became 8. A cleaned test material (chromium steel plate, 50 × 100 mm, thickness 5 mm) was immersed in these samples 11 and 12, and immediately thereafter left in an electric furnace filled with steam at a temperature of 200 to 250 ° C. for 3 hours. After that, take out and expose indoors at room temperature for 30 days.
The rust prevention properties and appearance of the test materials on days 30 and 30 were observed. 7
The observation results on the day are shown in Table 6 below, and the observation results on the 30th day are shown in Table 7 below. In Tables 6 and 7, each symbol was evaluated according to the following criteria. ◎: No change at all △: Small degree of change ×: Large degree of change

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−227186(JP,A) 特開 昭59−143091(JP,A) 特開 昭47−43702(JP,A) 特開 昭55−62183(JP,A) 特開 昭57−108270(JP,A) 特開 昭49−90644(JP,A) 特公 昭 51−546(JP,B2)   ────────────────────────────────────────────────── ─── Continuation of front page       (56) References JP-A-61-227186 (JP, A)                 JP-A-59-143091 (JP, A)                 JP-A-47-43702 (JP, A)                 JP-A-55-62183 (JP, A)                 JP-A-57-108270 (JP, A)                 JP-A-49-90644 (JP, A)                 Tokiko Sho 51-546 (JP, B2)

Claims (1)

(57)【特許請求の範囲】 1.(A) 一般式 〔式中R1及びR2は、同一又は異なって水素原子、アルキ
ル基、ニトロ基、アミノ基又は水酸基を示し、nは1〜
3の整数を示す〕 で表わされる安息香酸誘導体及び一般式 〔式中R1、R2及びnは前記に同じ。〕 で表わされるナフチル酸誘導体からなる群から選ばれた
少なくとも1種、 (B) ベンゾトリアゾール類、ベンゾチアゾール類、
イミダゾール類及びピラゾール類からなる群から選ばれ
た少なくとも1種、 (C)アルカノールアミン、 並びに (D)界面活性剤 を含有し、pHが7〜11の範囲にある水溶性防錆組成物。
(57) [Claims] (A) General formula Wherein R 1 and R 2 are the same or different and represent a hydrogen atom, an alkyl group, a nitro group, an amino group or a hydroxyl group, and n is 1 to
A benzoic acid derivative represented by the general formula: Wherein R 1 , R 2 and n are the same as above. At least one selected from the group consisting of naphthylic acid derivatives represented by the following formulas: (B) benzotriazoles, benzothiazoles,
A water-soluble rust preventive composition containing at least one selected from the group consisting of imidazoles and pyrazoles, (C) an alkanolamine, and (D) a surfactant, and having a pH in the range of 7 to 11.
JP61252388A 1986-10-22 1986-10-22 Water soluble rust preventive composition Expired - Fee Related JP2843934B2 (en)

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Publication number Priority date Publication date Assignee Title
US5322635A (en) * 1991-05-16 1994-06-21 H.E.R.C. Incorporated Soap compositions of carboxylic acids and amines useful in removal and prevention of scale
WO2007037045A1 (en) * 2005-09-28 2007-04-05 Chubu Chelest Co., Ltd. Metal rust preventive compound powder, process for producing the same, composition for metal rust prevention and film for metal rust prevention
JP2017088989A (en) * 2015-11-17 2017-05-25 住友電工焼結合金株式会社 Cleaning method of iron-based component
JP7508196B2 (en) * 2018-12-14 2024-07-01 日本パーカライジング株式会社 Surface treatment agents and their uses

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JPS5562183A (en) * 1978-11-02 1980-05-10 Hitachi Ltd Corrosion preventing method for recirculation system piping at boiling water type nuclear reactor plant
JPS59143091A (en) * 1983-02-03 1984-08-16 Fukuda Kinzoku Hakufun Kogyo Kk Manufacture of copper foil having superior rust preventing power
JPS61227186A (en) * 1985-03-29 1986-10-09 Kanzaki Paper Mfg Co Ltd Volatile rust inhibitor

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