JP2941560B2 - Surface treatment method for polypropylene lining - Google Patents
Surface treatment method for polypropylene liningInfo
- Publication number
- JP2941560B2 JP2941560B2 JP4123381A JP12338192A JP2941560B2 JP 2941560 B2 JP2941560 B2 JP 2941560B2 JP 4123381 A JP4123381 A JP 4123381A JP 12338192 A JP12338192 A JP 12338192A JP 2941560 B2 JP2941560 B2 JP 2941560B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- lining
- polypropylene
- phenol resin
- type phenol
- 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
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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
- C23C22/62—Treatment of iron or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は各種装置の配管、機器な
どの金属（炭素鋼）材料に適用されるポリプロピレンラ
イニングの下地処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a base material of a polypropylene lining applied to a metal (carbon steel) material such as piping and equipment of various apparatuses.
【０００２】[0002]
【従来の技術】従来の下地処理方法としては被ライニン
グ材表面（金属表面）を脱脂洗浄したのち、ブラスト処
理または酸洗浄後、リン酸塩による化成処理被膜を形成
させるなどの方法が知られている。2. Description of the Related Art As a conventional undercoating method, there has been known a method in which a surface of a lining material (metal surface) is degreased and washed, followed by blasting or acid washing, and then forming a chemical conversion treatment film with phosphate. I have.
【０００３】[0003]
【発明が解決しようとする課題】従来の下地処理方法に
よってライニングしたポリプロピレンライニングは比較
的温度の低い環境（４０℃以下）に使用した場合には、
それなりの耐久寿命が得られるが、それ以上の温度、特
に６０〜１００℃の水溶液と接触する環境に用いた場
合、ライニング被膜が剥離したり、ブリスタを生じるな
どの問題がある。剥離及びブリスタ部の被ライニング面
を調査すると必ず、被ライニング面が腐食されているこ
とから、前記、高温環境においても、被ライニング面が
腐食されないような下地処理方法の開発が望まれている
のが現状である。The polypropylene lining lined by the conventional surface treatment method, when used in a relatively low temperature environment (40 ° C. or less),
Although a certain durable life can be obtained, there is a problem that the lining coating is peeled off or blisters are generated when used in an environment in which it is in contact with an aqueous solution at a higher temperature, particularly at 60 to 100 ° C. Investigation of the lining surface of the peeling and blister portions always shows that the lining surface is corroded. Therefore, even in the high-temperature environment, it is desired to develop a base treatment method that does not corrode the lining surface. Is the current situation.
【０００４】本発明は上記技術水準に鑑み、高温環境下
においても優れたポリプロピレンライニングを施工でき
る金属（炭素鋼）表面の下地処理方法を提供しようとす
るものである。The present invention has been made in view of the above-mentioned state of the art, and an object of the present invention is to provide a method of treating a metal (carbon steel) surface under which a superior polypropylene lining can be applied even in a high-temperature environment.
【０００５】[0005]
【課題を解決するための手段】本発明は金属表面にポリ
プロピレンの粉体をライニングするに際し、金属表面を
脱脂、洗浄後、酸洗し、水洗したのち、苛性ソーダ、オ
ルトリン酸ソーダ、亜硝酸ソーダからなる沸騰水溶液中
に浸漬し、該金属表面にＦｅ3 Ｏ4 を主体とする被膜を
形成させ、次いで、水に任意に溶解し、かつその硬化反
応温度が水の沸点よりも高い水溶性のレゾール型フェノ
ール樹脂水溶液を接触させたのち、水の沸点よりも高い
温度で該レゾール型フェノール樹脂を硬化させることを
特徴とするポリプロピレンライニングの下地処理方法で
ある。According to the present invention, when lining a metal powder with a polypropylene powder, the metal surface is degreased, washed, pickled, washed with water, and then treated with sodium hydroxide, sodium orthophosphate and sodium nitrite. Immersed in a boiling aqueous solution to form a film mainly composed of Fe 3 O 4 on the metal surface, and then arbitrarily dissolved in water, and the curing reaction temperature of which is higher than the boiling point of water. The method of claim 1, wherein the resol type phenol resin is cured at a temperature higher than the boiling point of water after contacting the aqueous solution of the type phenol resin.
【０００６】本発明において、被ライニング材表面に均
一で緻密な耐熱性、耐食性及び付着力に優れたＦｅ3 Ｏ
4 被膜を形成するためには苛性ソーダ４０〜５０wt％、
オルトリン酸ソーダ５〜１５wt％、亜硝酸ソーダ２〜８
wt％の沸騰水が用いられるが、好ましくは苛性ソーダ４
５wt％、オルトリン酸ソーダ１０wt％、亜硝酸ソーダ５
wt％の沸騰水であり、結晶粒径の均一なＦｅ3 Ｏ4 被膜
が形成される。In the present invention, a uniform and dense Fe 3 O having excellent heat resistance, corrosion resistance and adhesion is provided on the surface of the lining material.
Caustic soda 40～50Wt% in order to form a 4 coating,
Sodium orthophosphate 5-15% by weight, sodium nitrite 2-8
wt% boiling water is used, preferably caustic soda 4
5wt%, sodium orthophosphate 10wt%, sodium nitrite 5
It is boiling water of wt%, and an Fe 3 O 4 film having a uniform crystal grain size is formed.
【０００７】[0007]
【作用】本発明は脱脂、洗浄後、酸洗し、水洗すること
によって、被ライニング材の表面を清浄にし、この面
に、耐熱、耐食性、付着性に優れないるＦｅ3 Ｏ4 の均
一で緻密な被膜を形成しており、従来のブラスト処理あ
るいは化成処理被膜の下地処理において、ポリプロピレ
ン粉体の加熱溶融ライニング時に生じていた局部的な酸
化膜（Ｆｅ2 Ｏ3 主体）の形成あるいは化成処理被膜の
結晶水揮散による微細クラックの発生などもなく、高温
環境に使用した場合でも、緻密なＦｅ3 Ｏ4均一膜によ
って、被ライニング材の腐食が抑制される。According to the present invention, the surface of the material to be lined is cleaned by degreasing, washing, pickling, and washing with water, and the surface of the material is made of Fe 3 O 4 which is excellent in heat resistance, corrosion resistance and adhesion. It forms a dense film and forms a local oxide film (mainly composed of Fe 2 O 3 ) or a chemical conversion treatment that occurs during the heating and melting lining of polypropylene powder in the conventional blasting or chemical conversion coating undercoating. Even when used in a high-temperature environment, there is no occurrence of fine cracks due to evaporation of crystal water in the film, and the dense Fe 3 O 4 uniform film suppresses corrosion of the material to be lined.
【０００８】更に本発明では被ライニング材表面にＦｅ
3 Ｏ4 の緻密で均一な被膜を形成させたのち、水に任意
に溶解し、かつその硬化反応温度が水の沸点よりも高い
水溶性のレゾール型フェノール樹脂水溶液と接触させて
おり、前記、Ｆｅ3 Ｏ4 被膜の結晶欠乏箇所あるいは結
晶と結晶の間に存在する緻密な空隙に前記水溶性のレゾ
ール型フェノール樹脂を含浸、硬化させており、被ライ
ニング材の防食を更に強化している。In the present invention, the surface of the material to be lined is
After forming a dense and uniform coating of 3 O 4 , it is arbitrarily dissolved in water, and its curing reaction temperature is brought into contact with a water-soluble aqueous resol type phenol resin solution having a boiling point higher than that of water. The water-soluble resol-type phenol resin is impregnated and hardened into the crystal-deficient portions of the Fe 3 O 4 coating or the dense voids existing between the crystals to further enhance the corrosion prevention of the lining material.
【０００９】[0009]
【実施例】厚さ３mm，直径１２０mmの炭素鋼板を６０℃
のオルトケイ酸ソーダ３％溶液に１０分間浸漬したの
ち、温水洗浄し、次いで５０℃の塩酸５％溶液に１０分
間浸漬したのち９０℃の温水で洗浄した。次いで苛性ソ
ーダ４５wt％、オルトリン酸ソーダ１０wt％、亜硝酸ソ
ーダ５wt％、水４０wt％からなる溶液の沸騰溶液中に２
０分間浸漬し、さらに５０℃の温水で十分に洗浄したの
ち、水に任意に溶解し、かつその硬化温度が水の沸点よ
りも高い水溶性のレゾール型フェノール樹脂（旭有機工
業株式会社製，ＡＶライト）を種々の濃度に調整した溶
液に１分間浸漬した。次いで１００℃で１０分間水分を
蒸発させたのち、１３０℃で３０分間硬化させた。EXAMPLE A carbon steel sheet having a thickness of 3 mm and a diameter of 120 mm was heated to 60 ° C.
Was soaked in a 3% solution of sodium orthosilicate for 10 minutes, washed with warm water, then soaked in a 5% solution of hydrochloric acid at 50 ° C. for 10 minutes, and washed with warm water at 90 ° C. Then, 2 wt% of a solution consisting of 45 wt% of caustic soda, 10 wt% of sodium orthophosphate, 5 wt% of sodium nitrite and 40 wt% of water was added.
After immersion for 0 minutes and further washing sufficiently with warm water of 50 ° C., a water-soluble resol type phenol resin which is arbitrarily dissolved in water and whose curing temperature is higher than the boiling point of water (manufactured by Asahi Organic Industry Co., Ltd. AV light) was immersed for 1 minute in solutions adjusted to various concentrations. Next, after evaporating water at 100 ° C. for 10 minutes, curing was performed at 130 ° C. for 30 minutes.
【００１０】これを２５０℃±２０℃に加熱したのち、
メルトインデックス５で平均粒径１００μｍのポリプロ
ピレン粉末を散布して溶融させ、ポリプロピレンライニ
ング供試体を作製した。After heating this to 250 ° C. ± 20 ° C.,
A polypropylene powder having an average particle size of 100 μm was sprayed and melted at a melt index of 5 to prepare a polypropylene-lined specimen.
【００１１】この供試体を用い、ライニング側が１００
℃で５％硫酸水溶液に接触し、ライニングしてない供試
体面が２０℃の冷却水で冷却されている温度勾配下で、
１年間の耐久性評価試験を行った。その結果を表１に示
す。この結果、本発明の方法で下地処理を行なった供試
材は全く異常が認められず、非常に優れた耐久性を有し
ていることを確認した。Using this specimen, the lining side is 100
At 5 ° C. under a temperature gradient where the unlined specimen surface is contacted with a 5% sulfuric acid aqueous solution at 20 ° C. and cooled with cooling water at 20 ° C.
A one-year durability test was performed. Table 1 shows the results. As a result, it was confirmed that no abnormality was observed in the test material subjected to the base treatment by the method of the present invention, and that the test material had extremely excellent durability.
【００１２】[0012]
【表１】 [Table 1]
【００１３】[0013]
【発明の効果】本発明の下地処理方法を適用することに
より、耐剥離性及び耐ブリスタ性に優れ、かつ、耐熱
性、耐薬品性に優れた安価なポリプロピレンライニング
が各種装置の配管や機器に安心して適用できるようにな
った。その工業的、経済的効果は非常に大きいものがあ
る。By applying the undercoating method of the present invention, an inexpensive polypropylene lining having excellent peeling resistance and blister resistance, and excellent heat resistance and chemical resistance can be used for piping and equipment of various devices. Now you can apply with confidence. Its industrial and economic effects are very large.
Claims (1)
ニングするに際し、金属表面を脱脂、洗浄後、酸洗し、
水洗したのち、苛性ソーダ、オルトリン酸ソーダ、亜硝
酸ソーダからなる沸騰水溶液中に浸漬し、該金属表面に
Ｆｅ3 Ｏ4 を主体とする被膜を形成させ、次いで、水に
任意に溶解し、かつその硬化反応温度が水の沸点よりも
高い水溶性のレゾール型フェノール樹脂水溶液を接触さ
せたのち、水の沸点よりも高い温度で該レゾール型フェ
ノール樹脂を硬化させることを特徴とするポリプロピレ
ンライニングの下地処理方法。When lining a metal powder with polypropylene powder, the metal surface is degreased, washed, and then pickled,
After washing with water, it is immersed in a boiling aqueous solution composed of caustic soda, sodium orthophosphate, and sodium nitrite to form a film mainly composed of Fe 3 O 4 on the metal surface, and then arbitrarily dissolved in water, and A base treatment for a polypropylene lining, which comprises contacting an aqueous solution of a resol-type phenol resin having a curing reaction temperature higher than the boiling point of water and then curing the resol-type phenol resin at a temperature higher than the boiling point of water. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4123381A JP2941560B2 (en) | 1992-05-15 | 1992-05-15 | Surface treatment method for polypropylene lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4123381A JP2941560B2 (en) | 1992-05-15 | 1992-05-15 | Surface treatment method for polypropylene lining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0610152A JPH0610152A (en) | 1994-01-18 |
| JP2941560B2 true JP2941560B2 (en) | 1999-08-25 |
Family
ID=14859177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4123381A Expired - Fee Related JP2941560B2 (en) | 1992-05-15 | 1992-05-15 | Surface treatment method for polypropylene lining |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2941560B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2334906A (en) * | 1998-03-02 | 1999-09-08 | British Steel Plc | Laminated metal strip |
-
1992
- 1992-05-15 JP JP4123381A patent/JP2941560B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0610152A (en) | 1994-01-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990525 |
|
| LAPS | Cancellation because of no payment of annual fees |