JPS60131959A - Pretreatment for dry galvanizing - Google Patents
Pretreatment for dry galvanizingInfo
- Publication number
- JPS60131959A JPS60131959A JP58240277A JP24027783A JPS60131959A JP S60131959 A JPS60131959 A JP S60131959A JP 58240277 A JP58240277 A JP 58240277A JP 24027783 A JP24027783 A JP 24027783A JP S60131959 A JPS60131959 A JP S60131959A
- Authority
- JP
- Japan
- Prior art keywords
- flux
- steel sheet
- soln
- tank
- pickling
- 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
- 238000005246 galvanizing Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 52
- 239000010959 steel Substances 0.000 claims abstract description 52
- 230000004907 flux Effects 0.000 claims abstract description 40
- 239000004094 surface-active agent Substances 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims description 20
- 238000000576 coating method Methods 0.000 claims description 20
- 238000002203 pretreatment Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 abstract description 22
- 238000005554 pickling Methods 0.000 abstract description 19
- 238000007747 plating Methods 0.000 abstract description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 8
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract description 5
- 235000019270 ammonium chloride Nutrition 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 4
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 abstract description 4
- 239000003925 fat Substances 0.000 abstract description 3
- 239000011592 zinc chloride Substances 0.000 abstract description 3
- 235000005074 zinc chloride Nutrition 0.000 abstract description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 abstract description 2
- 239000008397 galvanized steel Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 38
- 235000019198 oils Nutrition 0.000 description 21
- 238000005238 degreasing Methods 0.000 description 15
- 239000010410 layer Substances 0.000 description 10
- 239000011247 coating layer Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 235000014593 oils and fats Nutrition 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 239000002736 nonionic surfactant Substances 0.000 description 2
- 239000010731 rolling oil Substances 0.000 description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 description 2
- 239000008158 vegetable oil Substances 0.000 description 2
- QDHHCQZDFGDHMP-UHFFFAOYSA-N Chloramine Chemical compound ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005237 degreasing agent Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007716 flux method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000003760 tallow Substances 0.000 description 1
- POWFTOSLLWLEBN-UHFFFAOYSA-N tetrasodium;silicate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-][Si]([O-])([O-])[O-] POWFTOSLLWLEBN-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/30—Fluxes or coverings on molten baths
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、乾式溶融亜鉛めっきの前処理方法に関し、特
に被めっき鋼材表面に油脂類やそｎに類する汚れが付着
していても健全なめつき層を形成し得るようにしたもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pretreatment method for dry hot-dip galvanizing, and in particular to a pretreatment method for forming a healthy plating layer even if oil or similar stains are attached to the surface of the steel material to be plated. This is what I did.
フラックス法による溶融亜鉛めっきにおいては、予め被
めっき鋼材（鋼板、線材、釘、型物など）の表面に付着
している油脂類などの汚れを除去する脱脂処理および表
面スケール除去のための酸洗処理により表面を浄化して
おき、その表面にフラックス溶液を塗布し乾燥してフラ
ックス板層層を形成し、しかるのちめっき浴槽内に浸漬
することにより亜鉛めっきが施こされる。脱脂処理には
、オルソ珪酸ソーダ、水酸化ナトリウム等のアルカリ脱
脂剤が、また酸洗処理には、硫酸ないし塩酸を主成分と
する浴がそれぞｎ汎用さｎている。Hot-dip galvanizing using the flux method requires degreasing to remove dirt such as oils and fats adhering to the surface of the steel material to be plated (steel plates, wire rods, nails, molds, etc.) and pickling to remove surface scale. The surface is purified by treatment, a flux solution is applied to the surface and dried to form a flux plate layer, and then galvanized by immersing it in a plating bath. For degreasing treatment, alkaline degreasing agents such as sodium orthosilicate and sodium hydroxide are commonly used, and for pickling treatment, baths containing sulfuric acid or hydrochloric acid as a main component are commonly used.
フラックス法理は、脱脂・酸洗処理により清浄化された
鋼材表面の活性を保持し、その表面に形成されるめっき
層の密着性、健全性を高めることを目的とするもので、
その処理は一般に塩化亜鉛（Ｚｎ（Ｊ？２） および塩
化アンモニウム（ＮＨ２Ｃｌ）を主成分とＴる水溶液に
鋼材を浸漬することにより行なわｎる。The purpose of the flux principle is to maintain the activity of the steel surface that has been cleaned through degreasing and pickling, and to improve the adhesion and soundness of the plating layer formed on that surface.
The treatment is generally carried out by immersing the steel material in an aqueous solution containing zinc chloride (Zn(J?2)) and ammonium chloride (NH2Cl) as main components.
ところで、鋼材表面の脱脂処理が不十分で、表面に油脂
類が残存すると、その部分は油はじき現象により濡れ性
が悪く、フラックス溶液の付着が不十分となる。フラッ
クス溶液の付着が不十分であると、形成されるフラック
ス被覆層が不完全なものとなるためその部分が不めっき
となったり、ピンホールなどの欠陥が発生し、健全なめ
つき層を形成することができないｄ
本発明は、フラックス被覆層を形成する際に界面活性剤
を使用することにより油脂類などの汚れに起因する上記
問題を解決したものであり、鋼材を溶融亜鉛めっきする
に当り、その表面に界面活性剤を含むフラックス溶液の
被覆層を形成することを特徴とする前処理法を提供する
。By the way, if the surface of the steel material is insufficiently degreased and oils and fats remain on the surface, the wettability of that part will be poor due to oil repellency, and the flux solution will not adhere to it sufficiently. If the adhesion of the flux solution is insufficient, the flux coating layer that is formed will be incomplete, resulting in unplated areas or defects such as pinholes, resulting in the formation of a sound plated layer. The present invention solves the above-mentioned problems caused by dirt such as oils and fats by using a surfactant when forming a flux coating layer, and when hot-dip galvanizing steel materials, Provided is a pretreatment method characterized by forming a coating layer of a flux solution containing a surfactant on the surface.
本発明によりは、第３図に示すように、鋼材（１）の表
面に油脂類などの油膜（２）が存在していてもフラック
ス溶液の塗膜（３）の形成には何らさしつかえはない。According to the present invention, as shown in FIG. 3, even if there is an oil film (2) made of oil or fat on the surface of the steel material (1), there is no problem in forming the coating film (3) of the flux solution. .
界面活性剤（４）の疎水基（４１）と親水基（４２）が
フラックス溶液の塗膜（３）と油膜（２）との界面で一
定の配向をなし、フラックス溶液の表面張力の低下・濡
れ性の向上により油膜表面での７ラツクス溶液の油はじ
き現象が解消されるので、油膜（２）の表面をも十分に
フラックス溶液の塗膜（３）で被覆することができる。The hydrophobic group (41) and hydrophilic group (42) of the surfactant (4) form a certain orientation at the interface between the coating film (3) of the flux solution and the oil film (2), reducing the surface tension of the flux solution. The improved wettability eliminates the oil repelling phenomenon of the 7 lux solution on the surface of the oil film, so that the surface of the oil film (2) can also be sufficiently covered with the coating film (3) of the flux solution.
従って、フラックス溶液を塗布したのち、こｎを適当な
温度に加熱して乾燥丁れば、鋼材表面全体にわたってム
ラのないフランクス被覆層が形成されるので、その後の
溶融亜鉛めっきにおいては、不めっきやピンホールなど
を生じることがなく、密着性にすぐれた健全なめつき層
を形成することができる。鋼材表面の油脂類や界面活性
剤は分解温度、り！’４００〜５００ ’Ｃ’Ｆ度で、
亜鉛めっき浴（４５０〜ｓｏｏ℃）導入時に分解・燃焼
してしまうので、めっき性に対しては何ら悪影響を生じ
ることはない。Therefore, if you apply a flux solution and then heat it to an appropriate temperature and dry it, an even flux coating layer will be formed over the entire surface of the steel material. It is possible to form a healthy plating layer with excellent adhesion without causing pinholes or the like. The decomposition temperature of oils and surfactants on the surface of steel materials, ri! '400-500'C'F degrees,
Since it decomposes and burns when introduced into the galvanizing bath (450 to sooC), there is no adverse effect on plating properties.
本発明に使用される界面活性剤は、陰イオン系、陽イオ
ン系および非イオン系の３種に大別され、そ扛ぞれ各種
の市販品を使用することができるカξことに非イオン界
面活性剤の使用は極めて良好な結果をもたらす。フラッ
クス溶液は、前記例示の水溶液など、この種−の処理に
使用されている任意の７ランクス溶液であってよい。The surfactants used in the present invention are roughly divided into three types: anionic, cationic, and nonionic. The use of surfactants gives very good results. The flux solution may be any 7 rank solution used in this type of process, such as the aqueous solution exemplified above.
本発明による７ラツクス溶液の塗膜の形成は、フラック
ス溶液に界面活性剤を添加しておき、これに鋼材を浸漬
することにより達成さｎる。フラックス溶液中の界面活
性剤の濃度は少くとも０．１Ｗ ／ Ｗ％であることが
望まｎる。実ラインにおいては、操業の安定性とコスト
の両面を考慮すると、フラックス溶液中の界面活性剤の
適正な濃度は約０．２〜０．４ ｗ ／ ｗ％である。Formation of a coating film using a 7-lux solution according to the present invention is achieved by adding a surfactant to the flux solution and immersing the steel material in the flux solution. It is desired that the concentration of surfactant in the flux solution is at least 0.1% W/W. In an actual line, considering both operational stability and cost, the appropriate concentration of surfactant in the flux solution is about 0.2-0.4 w/w%.
また、７ラツクス溶液の７ラツクスの濃度は通常約１５
°Ｂｅ’とさｎているが、界面活性剤を複合使用する本
発明では、そｎより低濃度であってよく、例えは５〜６
°Ｂｅ程度で十分である。なお、７ラツクス溶液の塗膜
形成の別法として、まず界面活性剤を鋼材表面に塗布し
、ついで界面活性剤を含まないフラックス溶液に浸漬す
る方法によってもよい。Also, the concentration of 7 lux in a 7 lux solution is usually about 15
°Be', but in the present invention where a surfactant is used in combination, the concentration may be lower than that, for example 5 to 6
About °Be is sufficient. As an alternative method for forming a coating film using the 7lux solution, a method may be employed in which a surfactant is first applied to the surface of the steel material and then the steel material is immersed in a flux solution that does not contain the surfactant.
７ラツクス溶液の塗膜を形成したのち、その乾燥処理は
常法に従い、適温、例えは２７０〜３００°Ｃで加熱す
ることにより達成される。After forming a coating film of the 7 lux solution, drying thereof is accomplished by heating at an appropriate temperature, for example 270 to 300°C, according to a conventional method.
本発明によるフラックス溶液の塗膜形成および界面活性
剤の添加効果の具体例について説明下ｎば、下記８種の
供試鋼板（Ａ）〜（［（）を準備し、非イオン界面活性
剤０〜１．０ｗ／ｗ％を含むフラックス溶液に浸漬して
塗膜を与え、ついで乾燥してフラックス層を形成したの
ち、溶融亜鉛めっきを行った。Specific examples of the coating film formation of the flux solution and the effect of adding a surfactant according to the present invention will be explained below. A coating film was provided by immersion in a flux solution containing ~1.0 w/w%, and then dried to form a flux layer, followed by hot-dip galvanizing.
ｔｘｔ 鋼板（Ａ）：牛脂系圧延油塗布（付着量２００
＊ｖ／ｉ）、脱脂・酸洗処理なし。txt Steel plate (A): Beef tallow-based rolling oil coating (coating amount 200
*v/i), no degreasing or pickling treatment.
（２）鋼板（Ｂ）：上記鋼板（Ａ）と同じ油脂塗布。(2) Steel plate (B): Same oil coating as above steel plate (A).
但し、脱脂・酸洗処理実施。However, degreasing and pickling treatment are performed.
（３）鋼板（Ｃ）：植物油系防錆油塗布（付着量１．３
ｙ／１ｒｉ）。脱脂・酸洗処理なし。(3) Steel plate (C): Vegetable oil-based rust preventive oil coating (coating amount: 1.3
y/1ri). No degreasing or pickling treatment.
（４）鋼板（Ｄ）：上記鋼板（Ｃ）と同じ油脂塗布。(4) Steel plate (D): Same oil coating as above steel plate (C).
但し、脱脂・酸洗処理実施。However, degreasing and pickling treatment are performed.
（５）鋼板（Ｅ）：鉱油系防錆油塗布（付着量１．５ｙ
／ｎｆ）。脱脂・酸洗処理なし。(5) Steel plate (E): Mineral oil-based anti-rust oil coating (coating amount: 1.5y)
/nf). No degreasing or pickling treatment.
（６）鋼板（Ｆ）二上記鋼板（Ｅ）と同じ油脂塗布。(6) Steel plate (F) 2. Same oil coating as above steel plate (E).
但し、脱脂・酸洗処理実施。However, degreasing and pickling treatment are performed.
（７）鋼板（Ｇ）：無塗油。脱脂・酸洗処理なし。(7) Steel plate (G): No oil. No degreasing or pickling treatment.
（８）鋼板（Ｈ） ：無塗油。脱脂・酸洗処理実施。(8) Steel plate (H): No oil. Degreasing and pickling treatment carried out.
※脱脂処理：オルン珪酸ソーダ３０ｙ／ｌ溶液（液温８
０°Ｃ）に５秒間浸漬。*Degreasing treatment: Orun silicate soda 30y/l solution (liquid temperature 8
0°C) for 5 seconds.
※酸洗処理：塩酸１５％（液温２５°Ｃ）に７秒間浸漬
。*Pickling treatment: Immersed in 15% hydrochloric acid (liquid temperature 25°C) for 7 seconds.
※フラックス処理： ＺｎＣｌ２＋ＮＨ４Ｃｌ を主成
分とする水溶液（濃度１５°Ｂｅ′ｏ 液温６０℃）に
２秒間浸漬。界面活性剤添加量二〇〜１．０ｗ／ｗ％。*Flux treatment: Immerse for 2 seconds in an aqueous solution containing ZnCl2+NH4Cl as the main component (concentration 15°Be'o, liquid temperature 60°C). Surfactant addition amount: 20 to 1.0 w/w%.
上記各供試鋼板（Ａ）〜（［（）のめつき品質を第１図
に示す。図中の各マークは次のとおりである。The plating quality of each of the above-mentioned test steel plates (A) to ([() is shown in FIG. 1. Each mark in the figure is as follows.
・：鋼板（Ａ）、○：鋼板ＣＢ）、ム：鋼板（Ｃ）、△
：錆鋼板Ｄ）、マ：鋼板（Ｅ）、：錆鋼板Ｆ）、−二鋼
板（Ｇ）、ロ：鋼板（Ｈ）。・: Steel plate (A), ○: Steel plate CB), Mu: Steel plate (C), △
: Rusted steel plate D), M: Steel plate (E), : Rusted steel plate F), -2 steel plate (G), B: Steel plate (H).
図に示さｎるように、圧延油や防錆油を塗布した鋼板に
対して界面活性剤を含まない従来の７ラツクス溶液によ
る処理を行った場合は、たとえ脱脂、酸洗を実施しても
、めっき層にピンホールや不めっきが発生している。こ
れに対し、界面活性剤を０．１％以上含むフラックス溶
液を用いて処理すると、油脂類が塗布さｎた鋼板に対し
ても、脱脂・酸洗処理の有無を問わず、不めっき、ピン
ホール等のない健全なめつき層が形成されることがわか
る。As shown in the figure, when a steel plate coated with rolling oil or anti-rust oil is treated with a conventional 7lux solution that does not contain a surfactant, even if degreased and pickled, , Pinholes or unplated areas occur in the plating layer. On the other hand, when treated with a flux solution containing 0.1% or more of a surfactant, even steel sheets coated with oils and fats will be left unplated and pinned, regardless of whether they have been degreased or pickled. It can be seen that a healthy plating layer with no holes etc. is formed.
本発明の実施例として、第２図に示すごとき連続溶融亜
鉛めつきう゛イン（但し、脱脂工程なし）において、ペ
イオフリール（１０）から鋼板ｆｉｌを巻出しながら、
酸洗槽（１１）で酸洗したのち、水洗槽０２）で鋼板表
面の付着酸洗液を洗い流し、ついで非イオン界面活性剤
を含むフラックス溶液槽（１３）に通板してフラックス
溶液の塗膜を与えたのち乾燥炉（１４）にて塗膜を加熱
乾燥し、しかるのち溶融亜鉛めっき浴槽（１５）に通板
してめつ゛き層を形成しロール（１６）に巻取った。酸
洗液は塩酸１５％の常温液、フラックス溶液はＺｎＣｌ
２とＮＨ４Ｃｌ を主成分とする濃度１５°Ｂｅ’、液
温６０℃の水溶液で、非イオン界面活性剤の含有量は０
．３ ｗ ／ ｗ％とした。なお、ペイオフリールから
巻出さｎた直後の鋼帯表面には実験のために、鉱物油ベ
ースおよび植物油ベースの防錆油、有機系スキンパス油
をそれぞれ１ ｆｉｌ ／ｌｒｆ以上塗布した。この溶
融亜鉛めっきにて得らｎためつき鋼板のいづれも、ピン
ホールや不めっきなどはなく健全なめつき品質を有する
ことが確認された。As an example of the present invention, in a continuous hot-dip galvanizing machine (however, without a degreasing process) as shown in FIG. 2, while unwinding a steel plate from a payoff reel (10),
After pickling in the pickling tank (11), the pickling solution adhering to the surface of the steel plate is washed away in the water washing tank 02), and then the plate is passed through the flux solution tank (13) containing a nonionic surfactant to be coated with a flux solution. After the film was applied, the coating film was heated and dried in a drying oven (14), then passed through a hot-dip galvanizing bath (15) to form a plating layer, and wound onto a roll (16). The pickling solution is 15% hydrochloric acid at room temperature, and the flux solution is ZnCl.
An aqueous solution containing 2 and NH4Cl as main components at a concentration of 15°Be' and a liquid temperature of 60°C, with a nonionic surfactant content of 0.
．． 3 w/w%. For the purpose of experiment, mineral oil-based and vegetable oil-based antirust oils and organic skin pass oil were each applied at a concentration of 1 fil/lrf or more to the surface of the steel strip immediately after being unwound from the payoff reel. It was confirmed that all of the galvanized steel sheets obtained by this hot-dip galvanizing had a sound plating quality with no pinholes or unplated parts.
以上のように本発明によりは、鋼材表面の油脂類、その
他これに類する汚ｎの存否にかかわらず、鋼材表面全体
に所要の７ラツクス杖覆層を形成することができるので
、密着性に富む健全な溶融亜鉛めっき層を有するめっき
製品が得らｎる。従って、完全な脱脂処理の必要がない
ばかりか、脱脂処理そのものを省略してもさしつかえな
い。また、界面活性剤によりフラックス溶液の密着性が
すぐｎるので、鋼材表面の油脂類の付着が少ない場合は
、フラックス溶液の７ラツクス成分濃度をも従来に比し
大幅に低減することができる。As described above, according to the present invention, it is possible to form the required 7 lux coating layer on the entire surface of the steel material, regardless of the presence or absence of oils, fats, and other similar contaminants on the surface of the steel material. A plated product having a sound hot-dip galvanized layer can be obtained. Therefore, not only is there no need for complete degreasing treatment, but the degreasing treatment itself can be omitted. Furthermore, since the adhesion of the flux solution is quickly improved by the surfactant, the concentration of the 7 lux components in the flux solution can also be significantly reduced compared to the conventional method when there is little adhesion of oils and fats to the surface of the steel material.
“図面の簡単な説明 ４゜
第１図はフラックス溶液の界面活ノ０の濃度とめつき品
質の関係を示すグラフ、第２図は溶融亜鉛めっきライン
の工程概要図、第３図は本発明によりフラックス溶液し
た後の鋼材表面層の模式的断面説明図である。“Brief explanation of the drawings 4゜Figure 1 is a graph showing the relationship between the concentration of surfactant No. 0 in the flux solution and the plating quality, Figure 2 is a process outline diagram of a hot-dip galvanizing line, and Figure 3 is a graph showing the relationship between the surface active concentration of the flux solution and the plating quality. It is a schematic cross-sectional explanatory view of the steel material surface layer after flux solution.
ｌ：鋼材、２：油膜、３ニアラツクス溶液の塗膜、１１
；酸洗槽、１３：フラックス溶液槽、１４：乾燥炉、１
５；溶融亜鉛めっき槽。1: Steel material, 2: Oil film, 3 Near Lux solution coating film, 11
; Pickling tank, 13: Flux solution tank, 14: Drying oven, 1
5; Hot-dip galvanizing tank.
代理人 弁理士 宮 崎 新へ部 第１図 界面活ｌ浄剤の濃度（ｗ／ｗ ”／６ ）第２図 第３図Agent Patent Attorney Arata Miyazaki Figure 1 Concentration of surfactant l purifier (w/w”/6) Figure 2 Figure 3
Claims (1)
に界面活性剤を含むフラックス溶液の塗膜を形成するこ
とを特徴とする乾式溶融亜鉛めっきの前処理方法。[1] A pretreatment method for dry hot-dip galvanizing, which comprises forming a coating film of a flux solution containing a surfactant on the surface of a steel material when hot-dip galvanizing the steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58240277A JPS60131959A (en) | 1983-12-19 | 1983-12-19 | Pretreatment for dry galvanizing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58240277A JPS60131959A (en) | 1983-12-19 | 1983-12-19 | Pretreatment for dry galvanizing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60131959A true JPS60131959A (en) | 1985-07-13 |
| JPS648705B2 JPS648705B2 (en) | 1989-02-15 |
Family
ID=17057094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58240277A Granted JPS60131959A (en) | 1983-12-19 | 1983-12-19 | Pretreatment for dry galvanizing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60131959A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01500042A (en) * | 1986-03-04 | 1989-01-12 | エス．エイ．フロリディエンヌ−チミ− エヌ．ヴィ． | Fluoride-free flux compositions for hot galvanizing in zinc baths with varying aluminum content |
| JPH0641706A (en) * | 1992-02-21 | 1994-02-15 | Yodogawa Steel Works Ltd | Hot-dipping device for steel sheet by dry type flux system |
| JP2003100256A (en) * | 2001-09-25 | 2003-04-04 | Toshiba Lighting & Technology Corp | High pressure metallic vapor discharge lamp and luminaire |
| JP2005256152A (en) * | 2004-03-15 | 2005-09-22 | Chuo Kagaku Kk | Flux composition |
| JP2021031772A (en) * | 2019-08-19 | 2021-03-01 | Ｊｆｅスチール株式会社 | Hot-dip galvanizing flux liquid and method for manufacturing hot-dip galvanized steel pipe |
-
1983
- 1983-12-19 JP JP58240277A patent/JPS60131959A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01500042A (en) * | 1986-03-04 | 1989-01-12 | エス．エイ．フロリディエンヌ−チミ− エヌ．ヴィ． | Fluoride-free flux compositions for hot galvanizing in zinc baths with varying aluminum content |
| JPH0641706A (en) * | 1992-02-21 | 1994-02-15 | Yodogawa Steel Works Ltd | Hot-dipping device for steel sheet by dry type flux system |
| JP2003100256A (en) * | 2001-09-25 | 2003-04-04 | Toshiba Lighting & Technology Corp | High pressure metallic vapor discharge lamp and luminaire |
| JP2005256152A (en) * | 2004-03-15 | 2005-09-22 | Chuo Kagaku Kk | Flux composition |
| JP2021031772A (en) * | 2019-08-19 | 2021-03-01 | Ｊｆｅスチール株式会社 | Hot-dip galvanizing flux liquid and method for manufacturing hot-dip galvanized steel pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS648705B2 (en) | 1989-02-15 |
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