JPH01259198A - Surface treatment of steel welding groove prior to welding - Google Patents
Surface treatment of steel welding groove prior to weldingInfo
- Publication number
- JPH01259198A JPH01259198A JP8866888A JP8866888A JPH01259198A JP H01259198 A JPH01259198 A JP H01259198A JP 8866888 A JP8866888 A JP 8866888A JP 8866888 A JP8866888 A JP 8866888A JP H01259198 A JPH01259198 A JP H01259198A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- groove
- rust
- paint
- groove surface
- 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.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 48
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 12
- 239000010959 steel Substances 0.000 title claims abstract description 12
- 238000004381 surface treatment Methods 0.000 title claims description 4
- 239000003973 paint Substances 0.000 claims abstract description 28
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 7
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 4
- 239000002759 woven fabric Substances 0.000 claims abstract description 4
- 239000011810 insulating material Substances 0.000 claims abstract description 3
- 239000000049 pigment Substances 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims abstract description 3
- 229920005989 resin Polymers 0.000 claims abstract description 3
- 239000011347 resin Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 3
- 239000002075 main ingredient Substances 0.000 claims description 2
- 239000011241 protective layer Substances 0.000 claims description 2
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims 1
- 159000000000 sodium salts Chemical class 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 31
- 230000002265 prevention Effects 0.000 abstract description 12
- 230000007547 defect Effects 0.000 abstract description 8
- 238000004140 cleaning Methods 0.000 abstract description 5
- 229920000180 alkyd Polymers 0.000 abstract description 4
- 229910052708 sodium Inorganic materials 0.000 abstract description 3
- 229910052700 potassium Inorganic materials 0.000 abstract description 2
- 230000003449 preventive effect Effects 0.000 abstract 2
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- 239000004519 grease Substances 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract 1
- 239000010452 phosphate Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000002848 electrochemical method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 206010039509 Scab Diseases 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910000398 iron phosphate Inorganic materials 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業」−の利用分野〉
本発明は、鉄鋼材溶接開先部の導電性塗料塗布による比
較的短期間の防錆塗装処理と、全開先部の溶接に際して
の、前記塗装被膜や軽俄の錆なと溶接に支障を及はず惧
れのある開先部表面（＝１着物の剥離除去、清ｎ１化を
゛電気化学的手法により実施し、溶接欠陥の生じない良
好な溶接継手を実現せしめる鉄鋼材溶接開先部の溶接施
工に先立つ一連の前処理方法に関する。[Detailed Description of the Invention] <Field of Application in Industry> The present invention provides a relatively short period of anti-rust coating treatment by applying conductive paint to the welding groove of steel materials, and a method for welding the entire groove. The above-mentioned paint coating and light rust on the groove surface that may interfere with welding (= 1 removal of peeling and cleaning of the kimono are carried out using an electrochemical method to prevent welding defects from occurring). The present invention relates to a series of pretreatment methods prior to welding a welding groove of a steel material to achieve a good welded joint.
〈従来の技術〉
従来、鉄鋼材の溶接に当っては、先ず開先部を機械加工
により所定形状に削設したのち、適宜の溶接法によって
溶接を施工する。而し゛Ｃ開先部を形成した後、溶接施
工まてに期間か経過するにつれて、開先面は酸化か進み
、環境次第によっては赤錆か発生しＣ１このまま溶接ず
れば、フローホール、ピンポールなとの溶接欠陥を生ず
るため、該開先面の再研磨や再研削を要することかある
。<Prior Art> Conventionally, when welding steel materials, a groove is first cut into a predetermined shape by machining, and then welding is performed by an appropriate welding method. However, as time elapses between forming the C groove and welding, the groove surface will progress to oxidation, and depending on the environment, red rust will occur.C1 If welding continues as it is, flow holes and pin poles may occur. This may result in welding defects, requiring regrinding or regrinding of the groove surface.
このため、開先部形成後、速やかに溶接施「を実施し得
ない伺らかの事情かある時は、開先部の醇化防止のため
に 防錆手段か講しられ、通電は防錆塗料の塗布か採用
されている。斯かる防錆り段の採用により、開先部の発
錆は防止されるか、反面溶接施工の際、塗装のままて溶
接を行うと、塗料の燃焼カスの発生、溶接金属への非金
属介在物等不純物の混入などによるフローホール、ピン
ホール、水素割れなとの溶接欠陥や溶接強度の低）。For this reason, if for some reason it is not possible to perform welding immediately after the groove is formed, anti-rust measures are taken to prevent the groove from becoming molten. The application of paint is adopted.By adopting such a rust prevention step, rust is prevented from forming at the groove, but on the other hand, if welding is performed with the paint still on, the burnt residue of the paint may be generated. Flow holes, pinholes, hydrogen cracking, and other weld defects due to the incorporation of impurities such as non-metallic inclusions into the weld metal and low weld strength).
を招来する惧れか多分にあり、従って、溶接施下前に開
先部の塗膜を完全に剥離し、開先面を清浄化する必要か
ある。この塗膜の剥離作業は火炎による焼却、化学薬品
による溶解や機械的研磨なとの手段か採られるか、何れ
の手法によるも仲々に困難かつ煩雑な作業を強いられて
いる。Therefore, it is necessary to completely remove the paint film on the groove and clean the groove surface before welding. The removal of the paint film may be done by incineration with flames, dissolution with chemicals, or mechanical polishing, but whichever method is used, the work is difficult and complicated.
〈発明か解決しようとする課題〉
このため、当該塗料とし゛（剥離性のよいストリッパフ
ルベイン１〜が、或は塗膜を除去することなく、そのま
まて溶接し得るものとして亜鉛末、アルミニウム末等を
主体とする−・般防錆塗料型のものか一部において使用
されているか、前者のストリッパフルベイントの場合は
、＜：ｉ： ／／にしてペイントか開先面に残留しこれ
を完全に剥＃［、・なけれはならぬ困難さと煩雑さかあ
り、また後者の亜鉛、アルミニウム等の金属粉末を−）
一体とするものは、そのまま溶接し得るとは云うものの
溶接部分に−Ｊ１金属介在物の混入やフローホールの発
生を完！１ｔに防１１−するまてには到っておらず、延
いては溶接部の機械的強度を損う原因となっており、こ
の障害を避けるため、塗膜厚を減ずれは防錆性を低下さ
せ゛Ｃ実用性に乏しくなり、また特に亜鉛被Ｉ摸により
防錆性を高めるか如き高亜鉛塗料の場合は、人体に有害
な亜鉛蒸気を多植に発生して作業性に難点かあった。そ
こで不発明治等は、これらの欠点を散着して塗装のまま
て溶接可能な溶接Ｐ１のよい溶接開先用防錆塗料（キシ
訂第５２１４１０し、特許第５２１４１１−障：）を開
発し、更（こ、溶接＋１改善防錆塗才１（４４ＦΔ’Ｉ
第７２７１７２″−；）、溶接性を改−善する防鳥塗料
（４〜１作第８０８７４６号−）を発明し提案した。し
・か（）ながら、これ（ンの塗料においてもその使用を
誤れば、溶接１１′Ｆ、開先面の塗料の熱分解時に発生
ずる水素τ・のカスやその他の夾雑物に起因するフロー
ホール、ピンホールの発生や、水素割れ等の障害を完全
に拮除場ることはなお困難で、殊に拡散性水素による割
れ感受性の極めて高い高張力鋼等開先部への採用には尚
解決すべき課題が残っていた。<Problem to be Solved by the Invention> For this reason, the paint (stripper Full Vein 1~ with good releasability), or those that can be welded as they are without removing the paint film, such as zinc powder, aluminum powder, etc. Is it mainly a general anti-rust paint type or is it used in some areas? In the case of the former stripper full veint, the paint remains on the groove surface with <:i: // and it is completely removed. It is difficult and complicated to remove metal powders such as zinc and aluminum.
Although it can be welded as is, the welded part must be completely free of -J1 metal inclusions and flow holes! It has not yet been possible to prevent the welding from 1t, which in turn causes damage to the mechanical strength of the welded part.In order to avoid this problem, the coating thickness has been reduced and the anti-corrosion In addition, especially in the case of high-zinc paints that improve rust prevention by coating with zinc, there is a problem with workability as they generate a lot of zinc vapor that is harmful to the human body. there were. Therefore, Fuinenji et al. has developed an anti-corrosion paint for welding grooves that has a good welding P1 and can be welded with the paint applied (Kishi revised No. 521410, Patent No. 521411 - Obstacles), which has these defects scattered. Furthermore, welding + 1 improvement rust prevention coating 1 (44FΔ'I
No. 727172″-;), he invented and proposed a bird-preventing paint (No. 4-1 work No. 808746-) that improves weldability. If weld incorrectly, welding 11'F will completely eliminate problems such as flow holes and pinholes caused by hydrogen τ scum and other impurities generated during thermal decomposition of paint on the groove surface, as well as hydrogen cracking. It is still difficult to remove the method, and there are still problems to be solved, especially when applying it to grooves such as high-strength steel, which is extremely susceptible to cracking due to diffusible hydrogen.
〈課題を解決するだめの手段〉
このため、本発明は、開先部の！所定的防錆のために、
剥離性のよい電導性塗料の塗布を行う第１の工程と、溶
接施工に際し・では、前記開先部の塗膜を電気化学的手
法をもっ゛Ｃ効果的に剥離除去する第２の工程とを一連
の前処理工程とする開先部の溶接施工に先立つ表面処理
ブｊ法を特徴とするもので、更に詳述すると、鉄鋼材溶
接開先部に対し、金属アルミニウム末を顔料とする導電
性の例えはアルキラ１−系樹脂等の塗料を塗装ｉｊ シ
て防錆保護層を形成せしめる第１の工程と、溶接施工に
際しては、ト記鉄鋼材溶接開先部を一部の電極とを主剤
とする溶液を含浸させた滞水性絶縁材、例えは、織布ま
たは不織１ｊｉを介在させて」−記両電極間に通電し、
上記開先表面を電解処理して該表面の前記防錆塗膜や、
防錆不十分のため若し錆か発生し・ていれはその錆を、
また油脂なとの汚れか伺着しておれば、その付着物を夫
１１電解時の陽極溶解作用と発生期の酸、アルカリによ
る溶解洗浄作用、更には発生ずる水素、酸素なとのカス
圧により開先面からこれらを剥離除去する電気化学的毛
状による第２のＪ：程とにより、開先面の防錆効果と清
浄化とを一連の−「程によって斎らし、もって溶接施工
を容易かつ完壁ならしめ、欠陥のない溶接継手を実現し
得たものである。<Means for solving the problem> For this reason, the present invention provides a method for solving the problem! For specific rust prevention,
A first step of applying a conductive paint with good releasability, and a second step of effectively peeling off and removing the coating film on the groove part using an electrochemical method during welding work. This method is characterized by a surface treatment method prior to the welding of the groove, which involves a series of pretreatment steps. An example of this is the first process of coating a paint such as Alkyra 1-based resin to form a rust-preventive protective layer, and the process of welding the welding groove of the steel material with a part of the electrode. A water retentive insulating material impregnated with a solution as a main ingredient, for example, a woven fabric or a non-woven fabric, is interposed, and current is applied between the two electrodes,
The surface of the groove is electrolytically treated to form the anti-rust coating on the surface,
If rust occurs due to insufficient rust prevention, the rust may be removed.
In addition, if there is dirt such as oil or fat, the deposit can be removed by the dissolving action of the anode during electrolysis, the dissolving and cleaning action of acids and alkalis during the nascent stage, and the gas pressure of generated hydrogen and oxygen. A second J: process using electrochemical hair to peel and remove these from the groove surface is carried out in a series of steps to prevent rust and clean the groove surface, thereby allowing the welding process to proceed. This makes it possible to easily and perfectly form a welded joint without any defects.
〈作 用〉
本発明による開先部の防錆処理は、永久的な防錆を行う
ものてはなく、溶接施丁前の発錆を防止する暫定的な比
較的短期間の防錆作用を期待するものであるから展着剤
としては、剥離性のよいアルキッド系樹脂か適当である
か、その他アクリル酸系、フタル耐糸、フェノール系、
アクリル・アルキド系、シリコン・アルキ１−系なと、
防錆性と剥離性に若干の差はあるか、殆んとの展着剤か
適用できる。また、第２の工程とする電気化学的手法に
よる開先面の電解処理実施には、一方の電極つまり塗料
の被膜を施した開先面と、これに対向配置する他の電極
との間に電解液を介して電解作用を生せしめるものであ
るから、前記塗料は導電性であることか必要不ｉｊｆ欠
の条ヂ１てあり、このため顔料として金属アルミニウム
末を配合ｌノ、もって塗膜に導電性を伺Ｊｊせしめてい
る。尚、金属アルミニウムを採用した他の守山は、溶接
施工時に僅少であるからである。同様に、電解液として
、燐酸または燐酸のナトリウム塩やカリウム塩を採あと
に燐酸鉄系の被膜を形成して溶接施工まての短期間防錆
効果をＩＩ（１’ｊ−する効果かあり、かつ溶接施工に
際しては、溶接金属のぬれ性、流動性を向上させること
、さらには作業上人体に危険のない薬品であることなど
による。<Function> The rust prevention treatment of the groove according to the present invention does not permanently prevent rust, but rather provides a temporary and relatively short-term rust prevention effect to prevent rust from forming before welding. Since this is expected, the spreading agent should be an alkyd resin with good release properties, acrylic acid type, phthalate thread-resistant, phenol type, etc.
Acrylic/alkyd type, silicone/alkyd type, etc.
There are slight differences in rust prevention and removability, but most types of spreading agents can be applied. In addition, in the second step of electrolytic treatment of the groove surface using an electrochemical method, there is a gap between one electrode, that is, the groove surface coated with the paint, and another electrode placed opposite to it. Since electrolytic action is produced through an electrolytic solution, it is necessary for the paint to be electrically conductive, and for this reason, metal aluminum powder is mixed as a pigment, thereby improving the coating film. The conductivity is determined by Jj. This is because other Moriyama employing metal aluminum are only slightly removed during welding work. Similarly, after using phosphoric acid or sodium or potassium salts of phosphoric acid as an electrolyte, an iron phosphate film is formed to provide a short-term rust prevention effect until welding. , and during welding work, it improves the wettability and fluidity of weld metal, and furthermore, it is a chemical that is not dangerous to the human body during work.
さて、電解処理時の電気の極性は、一般的には開先面か
直流の陽極側に、また対極か陰極側に夫々接続される。Now, the polarity of electricity during electrolytic treatment is generally connected to the groove surface or the DC anode side, and to the counter electrode or cathode side, respectively.
−１−記開先面は前記塗料により被覆されているか、導
電性を有するため、両電極間に電圧を掛けると前記電解
液を介して電解作用か生し、開先面側に陽極溶解作用か
始まり、先ず開先面の導電性の塗膜か溶出剥離し、更に
露出した開先面か極〈軽度に電解研磨されて赤さひや非
金属介在物等諸々の付着汚れか除去されることとなる。-1- Since the groove surface is coated with the paint or has conductivity, when a voltage is applied between the two electrodes, an electrolytic action is generated through the electrolyte, and an anodic dissolution effect is produced on the groove surface side. First, the conductive coating on the groove surface is eluted and peeled off, and then the exposed groove surface is subjected to mild electrolytic polishing to remove various adhering stains such as red scabs and non-metallic inclusions. That will happen.
この際、電解により陽極、つまり開先面側から発生ずる
発生機の酸及び酸素カスによって」−記開先面付着物の
剥離清浄化作用か助長される。At this time, the acid and oxygen scum of the generator generated from the anode, that is, the groove surface side due to electrolysis, promotes the peeling and cleaning action of the deposits on the groove surface.
尚、電解処理時の電気の極性を１−記とは逆に開先面を
陰極にした場合には塗膜の剥離効果はむしろ大きいか、
電解時に陰極面に発生ずる発生機の水素の一部か開先面
に拡散吸蔵され、ひいては溶接時にフロポール発生の原
因となるのて好ましくなく、これを防止するためには、
開先面を陰極にして通電処理に引続き極性を逆の陽極に
して所定時間通電処理ずれは脱水素効果を伴なって叙１
−の障害をなくすることか出来る。In addition, if the polarity of electricity during electrolytic treatment is reversed from 1-, and the groove surface is used as the cathode, the peeling effect of the coating film will be greater.
Part of the hydrogen generated by the generator generated on the cathode surface during electrolysis is diffused and occluded on the groove surface, which is undesirable and may cause fropol generation during welding.To prevent this,
After applying current using the groove surface as a cathode, the polarity is then reversed to an anode, and the deviation in the current application process for a predetermined period of time is accompanied by a dehydrogenation effect.
- It is possible to eliminate the obstacles.
また、その他開先面を交流の一方の極になるように接続
して通電すると直流の場合に比べて若干効果は劣るか、
水素カスによる障害を伴わずしてｔす離することか出来
る。Also, if you connect the groove surface so that it becomes one pole of alternating current and energize it, the effect will be slightly less than that of direct current.
It is possible to separate it for a distance of 100 ft without causing any damage due to hydrogen scum.
尚又、開先面か長いあるいは広い場合は、」−記対極を
絶縁性の織４ｊまたは不織布によって覆い包んて、これ
に電解液を含浸させたうえ、この対極を開先面に当接さ
せ摺動しつつ順次開先面」−を移動させることにより、
開先面全域の電解による表面清浄化処理を行うことかで
きる。Furthermore, if the groove surface is long or wide, cover the counter electrode with an insulating woven or non-woven fabric, impregnate it with the electrolyte, and then bring the counter electrode into contact with the groove surface. By sequentially moving the groove surface while sliding,
Surface cleaning treatment can be performed by electrolysis over the entire groove surface.
〈実 施 例〉
塗料としては、金属アルミニウム末を１０〜５０％配合
したアクリル酸系塗料を使用し、複数の鋼材開先面に塗
布後、短期（２〜３ケ月間）と長期（約１ケ’Ｆ ｌ１
ｆｌ ）の暴露期間を与えた。長期暴露のものには、開
先面に軽い錆の発生か認められたか、短期暴露のものに
は全く発錆は認められず、防錆作用は充分てあった。電
解液としては、燐酸の５〜′ｊＯ％水溶液と、燐酸のナ
トリウム又はカリウム塩の５〜５０％水溶！夜とを使用
し、前記鋼材の開先面の塗装の電解による剥離テストを
実施したところ、前者の電解液による電解処理効果は大
きく、塗装及び錆の剥離、溶解効果は顕著であった。尚
後者の電解液による剥離、溶解作用は前者に比し若干劣
るものの、中性塩のためその取扱いか容易である利点か
ある。<Example> An acrylic acid-based paint containing 10 to 50% metal aluminum powder was used as the paint, and after being applied to multiple steel grooves, it was applied for a short period (2 to 3 months) and a long period (about 1 month). Ke'F l1
fl ) exposure period was given. In the case of long-term exposure, slight rust was observed on the groove surface, and in the case of short-term exposure, no rust was observed at all, indicating that the rust prevention effect was sufficient. The electrolyte is a 5-'jO% aqueous solution of phosphoric acid and a 5-50% aqueous solution of sodium or potassium phosphoric acid! When an electrolytic peeling test of the paint on the groove surface of the steel material was carried out using the electrolytic solution, the electrolytic treatment effect of the former electrolyte was large, and the peeling and dissolving effect of the paint and rust was remarkable. Although the peeling and dissolving action of the latter electrolyte is slightly inferior to that of the former, it has the advantage of being easier to handle because it is a neutral salt.
これらの電解処理を行って表面ン＾浄化した開先面に対
し溶接を施工したところ、溶接性は極めて良好て、ピン
ホール、フローホール等の発生全くなく溶接欠陥のない
溶接継手な得ることかてきた。When welding was carried out on the groove surface that had been purified by electrolytic treatment, the weldability was extremely good, and there were no pinholes, flow holes, etc., and a welded joint with no welding defects was obtained. It's here.
〈発明の効果〉
上述の説明のとおり、本発明方法によれば、鉄鋼材の開
先面の防錆措置と、全開先面の溶接施工時の全面清浄化
とを従来法に比し極めて簡単化すると共に、溶接性？も
高めて溶接欠陥の生しない優れた継手を実現し得るＭ鋼
材溶接開先部の溶接施工前における表面処理方法を提供
し・得て４−１．たイ１益である。<Effects of the Invention> As explained above, according to the method of the present invention, it is much easier to prevent rust on the grooved surface of steel materials and to clean the entire surface during welding of the entire grooved surface than with the conventional method. As well as improving weldability? To provide and obtain a surface treatment method for a welding groove portion of an M steel material before welding construction, which can realize an excellent joint without welding defects by increasing the welding temperature.4-1. This is a benefit.
特許出願人 株式会社ケミカル山木Patent applicant: Chemical Yamaki Co., Ltd.
Claims (1)
料とする導電性の樹脂塗料を塗布して防錆保護層を形成
せしめる第１の工程と、溶接施工に際しては、上記鉄鋼
材溶接開先部自体を一方の電極とし、これに対向して配
置する対極との間に、燐酸若しくは燐酸のナトリウム塩
またはカリウム塩を主剤とする溶液を含浸させた滞水性
絶縁材、例えば織布または不織布を介在させて上記両電
極間に通電し、上記開先部表面を電解処理して該表面の
前記防錆塗膜等付着物を剥離除去する第２の工程とより
なることを特徴とする鉄鋼材溶接開先部の溶接施工前に
おける表面処理方法。1. The first step is to apply a conductive resin paint containing metallic aluminum powder as a pigment to the welding groove of the steel material to form a rust-preventing protective layer. The tip itself is used as one electrode, and a water-retentive insulating material, such as a woven fabric or non-woven fabric, impregnated with a solution containing phosphoric acid or a sodium salt or potassium salt of phosphoric acid as a main ingredient is used between the tip itself as one electrode and a counter electrode placed opposite the tip. A second step of applying electricity between the two electrodes through the interposition of the groove, and electrolytically treating the surface of the groove to peel off and remove deposits such as the rust-preventive coating on the surface. Surface treatment method for welding grooves of materials before welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63088668A JP2515575B2 (en) | 1988-04-11 | 1988-04-11 | Surface treatment method before welding of steel welding groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63088668A JP2515575B2 (en) | 1988-04-11 | 1988-04-11 | Surface treatment method before welding of steel welding groove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01259198A true JPH01259198A (en) | 1989-10-16 |
| JP2515575B2 JP2515575B2 (en) | 1996-07-10 |
Family
ID=13949200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63088668A Expired - Lifetime JP2515575B2 (en) | 1988-04-11 | 1988-04-11 | Surface treatment method before welding of steel welding groove |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2515575B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6357800A (en) * | 1986-08-26 | 1988-03-12 | Chem Yamamoto:Kk | Method for removing zinc film formed on surface of iron and steel products |
-
1988
- 1988-04-11 JP JP63088668A patent/JP2515575B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6357800A (en) * | 1986-08-26 | 1988-03-12 | Chem Yamamoto:Kk | Method for removing zinc film formed on surface of iron and steel products |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2515575B2 (en) | 1996-07-10 |
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