JPS624468B2 - - Google Patents
Info
- Publication number
- JPS624468B2 JPS624468B2 JP54033834A JP3383479A JPS624468B2 JP S624468 B2 JPS624468 B2 JP S624468B2 JP 54033834 A JP54033834 A JP 54033834A JP 3383479 A JP3383479 A JP 3383479A JP S624468 B2 JPS624468 B2 JP S624468B2
- Authority
- JP
- Japan
- Prior art keywords
- zinc
- corrosion
- coated steel
- basic
- treatment 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
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
- C23F11/10—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 using organic inhibitors
- C23F11/16—Sulfur-containing compounds
- C23F11/165—Heterocyclic compounds containing sulfur as hetero atom
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
本発明は亜鉛被覆鋼材の防食法に関するもので
ある。
鋼材は防錆防食のために亜鉛メツキ及び各種の
合金メツキ等によつて被覆されるが、亜鉛メツキ
は貯蔵中、運搬中に高温多湿下で発錆しやすいと
いうこと、及び腐食環境下でのガルバニツクな防
食性という性質上腐食を進ませやすいという問題
があり、クロム酸塩処理、燐酸塩処理、珪酸塩処
理、有機被覆処理あるいは腐食抑制剤の適用等が
行なわれてきた。また亜鉛被覆鋼材の防食性向上
のために被覆量を多くする方向や亜鉛を合金化す
る方向等があるが、本法は有機質の腐食抑制剤を
適用して腐食を抑制させる方法に関するものであ
る。
金属の腐食抑制剤は腐食環境にその化合物を少
量添加することにより腐食を抑制させる性質のも
のであるが、金属の表面に膜状に形成されること
によつて供される腐食抑制剤があり、金属表面上
で吸着や、配位結合等の化学結合や立体化学的遮
へい効果等の作用で、電気化学的反応（カソード
アノード反応）、拡散反応を抑制して防食するも
のである。
本法は配位結合性等の作用による腐食効果によ
るものであり、前述の如く腐食環境下で高度の腐
食性を有する有機Ｓ、Ｎ化合物を腐食抑制剤とし
て適用する処理剤である。
本法は一般式
The present invention relates to a method for preventing corrosion of zinc-coated steel. Steel materials are coated with zinc plating and various alloy platings to prevent rust and corrosion, but galvanized plating is prone to rusting under high temperature and humidity during storage and transportation, and is susceptible to corrosion in corrosive environments. Due to its galvanic anti-corrosion properties, there is a problem in that corrosion tends to progress, so treatments such as chromate treatment, phosphate treatment, silicate treatment, organic coating treatment, or application of corrosion inhibitors have been carried out. In order to improve the corrosion resistance of zinc-coated steel materials, there are approaches such as increasing the amount of coating or alloying zinc, but this method concerns a method of suppressing corrosion by applying an organic corrosion inhibitor. . Corrosion inhibitors for metals have the property of inhibiting corrosion by adding a small amount of the compound to a corrosive environment, but there are corrosion inhibitors that are provided by forming a film on the surface of metals. It prevents corrosion by suppressing electrochemical reactions (cathode-anode reactions) and diffusion reactions through adsorption on the metal surface, chemical bonds such as coordinate bonds, and stereochemical shielding effects. This method is based on the corrosion effect due to the action of coordination bonds, etc., and as mentioned above, is a treatment agent that uses organic S, N compounds that are highly corrosive in a corrosive environment as a corrosion inhibitor. This method is a general formula
【式】の５員環または
６員環の基本環からなる複素環化合物を用いるも
のである。Ｘはアミン化合物、Ｙは同一元素また
は異種元素の基本環を構成するＣ、Ｎと、該基本
環元素ＣあるいはＮに結合するＯ、Ｈ、アルキル
からなる。
ＹはＣ、Ｎ、Ｏ、Ｈ等の元素から構成される
が、Ｙが−HC＝CH−のような二重結合性を有す
るものや、−SH、−NH2等の反応性の強い極性基
を有するものは充分でない。
本法において基本複素環化合物のチオカルボニ
ルのＳとの配位結合性の作用によつて腐食作用を
生ぜしめるが、A heterocyclic compound consisting of a 5-membered or 6-membered basic ring of the formula is used. X is an amine compound, Y is composed of C and N constituting a basic ring of the same element or different elements, and O, H, and alkyl bonded to the basic ring element C or N. Y is composed of elements such as C, N, O, and H, but Y has double bond properties such as -HC=CH-, and highly reactive polar elements such as -SH and -NH 2 . Those with groups are not sufficient. In this method, a corrosive effect is caused by the coordination bonding action of the thiocarbonyl of the basic heterocyclic compound with S.
【式】のＸが−NH−
アルキルのような場合、Ｎとの作用もあり、Ｎア
ミノローダニンがよい特性を示した。
本発明は、上記複素環化合物の一種または二種
以上に、燐酸亜鉛、フイチン酸等の燐酸化合物を
複合含有した水溶性または懸濁性の処理剤を電着
法の適用により、亜鉛被覆鋼材に表面膜形成する
防食方法に関するものである。
本処理剤にはさらにコロイドシリカ、タンニン
酸、エポキシ樹脂やポリイミド樹脂等の有機樹脂
及び界面活性剤を添加して用いることができる。
有機樹脂を用いる場合水に相容する４メチル２ペ
ンタノール等の非水の溶媒を用いてもよい。
本腐食抑制剤を含有する処理剤は10mg/以上
の濃度で適用され複素環化合物は形成された表面
膜中に通常0.1mg/m2〜２g/m2の範囲となるよう
に、電着条件を設定して適用される。その際必要
に応じ輻射加熱、誘導電気加熱等の方法で乾燥さ
れる。
本処理剤は通常亜鉛被覆鋼材に適用されるが、
既に形成されている燐酸塩等の表面膜上に適用し
てもよい。本亜鉛被覆鋼材は、亜鉛合金メツキを
も含み、熱漬亜鉛被覆鋼材、電気亜鉛被覆鋼材い
ずれにも適用される。
実施例
一般式において、Ｘ＝−NH2、Ｙ＝−CH2−
CO−のＮアミノローダニン1.5ｇ/、燐酸亜鉛
８ｇ/の水溶液中にて溶融亜鉛メツキ鋼板を35
℃、３A/dm2、10秒間の条件で陰極電解を行い、
乾燥した。塩化噴霧試験によつて比較試験を行つ
たところ、Ｎアミノローダニンを含まないものは
１時間後の発錆率が50％であつたが本処理板では
発錆率が１％以下であつた。When X in the formula is -NH- alkyl, there is also an effect with N, and N-aminorhodanine showed good properties. The present invention applies a water-soluble or suspendable treatment agent containing one or more of the above-mentioned heterocyclic compounds and a phosphoric acid compound such as zinc phosphate or phytic acid to zinc-coated steel by applying an electrodeposition method. This invention relates to a corrosion prevention method that forms a surface film. This treatment agent may further contain colloidal silica, tannic acid, organic resins such as epoxy resins and polyimide resins, and surfactants.
When using an organic resin, a non-aqueous solvent such as 4-methyl-2-pentanol that is compatible with water may be used. The treatment agent containing this corrosion inhibitor is applied at a concentration of 10 mg/m or more, and the electrodeposition conditions are adjusted so that the heterocyclic compound is usually in the range of 0.1 mg/m 2 to 2 g/m 2 in the formed surface film. is set and applied. At that time, drying is performed by radiant heating, induction electric heating, or the like, if necessary. This treatment agent is usually applied to zinc-coated steel materials, but
It may also be applied onto an already formed surface film of phosphate or the like. This zinc-coated steel material also includes zinc alloy plating, and is applicable to both hot-dipped zinc-coated steel material and electrolytic zinc-coated steel material. Examples In the general formula, X= -NH2 , Y= -CH2-
A hot-dip galvanized steel sheet was heated at 35°C in an aqueous solution of 1.5g/N aminorhodanine of CO- and 8g/zinc phosphate.
Cathode electrolysis was performed at 3 A/dm 2 for 10 seconds at
Dry. When a comparative test was conducted using a chloride spray test, the rusting rate after 1 hour was 50% for the plate that did not contain N-aminorhodanine, but the rusting rate for this treated plate was less than 1%. .
Claims (1)
り、Ｘはアミン化合物、Ｙは同一元素または異種
元素の基本環を構成するＣ、Ｎと、該基本元素Ｃ
あるいはＮに結合するＯ、Ｈ、アルキルからなる
複素環化合物の一種または二種以上と燐酸化合物
を複合含有した処理剤を亜鉛被覆鋼材に電着法に
よつて表面膜形成することを特徴とする亜鉛被覆
鋼材の防食法。[Claims] 1. General formula , the basic ring consists of a 5-membered ring or a 6-membered ring, X is an amine compound, Y is C, N constituting the basic ring of the same element or different element, and the basic element C
Alternatively, it is characterized by forming a surface film on zinc-coated steel by electrodepositing a treatment agent containing a complex of one or more heterocyclic compounds consisting of O, H, and alkyl bonded to N and a phosphoric acid compound. Corrosion prevention method for zinc-coated steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3383479A JPS55128585A (en) | 1979-03-24 | 1979-03-24 | Prevention of corrosion of zinc-coated steel material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3383479A JPS55128585A (en) | 1979-03-24 | 1979-03-24 | Prevention of corrosion of zinc-coated steel material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55128585A JPS55128585A (en) | 1980-10-04 |
| JPS624468B2 true JPS624468B2 (en) | 1987-01-30 |
Family
ID=12397511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3383479A Granted JPS55128585A (en) | 1979-03-24 | 1979-03-24 | Prevention of corrosion of zinc-coated steel material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55128585A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4568386B2 (en) * | 1997-05-14 | 2010-10-27 | 日本ペイント株式会社 | Rust prevention coating agent and rust prevention treatment method |
| JP4534217B2 (en) * | 1999-01-29 | 2010-09-01 | 新日本製鐵株式会社 | Non-chromium surface-treated metal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6041713B2 (en) * | 1978-10-31 | 1985-09-18 | 新日本製鐵株式会社 | White rust prevention treatment method for galvanized steel sheets |
-
1979
- 1979-03-24 JP JP3383479A patent/JPS55128585A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55128585A (en) | 1980-10-04 |
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