CN101514464A - Rolled thin steel plate galvanizing technique - Google Patents

Rolled thin steel plate galvanizing technique Download PDF

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Publication number
CN101514464A
CN101514464A CNA2009100145264A CN200910014526A CN101514464A CN 101514464 A CN101514464 A CN 101514464A CN A2009100145264 A CNA2009100145264 A CN A2009100145264A CN 200910014526 A CN200910014526 A CN 200910014526A CN 101514464 A CN101514464 A CN 101514464A
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China
Prior art keywords
steel plate
thin steel
grams
washing
plate
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Pending
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CNA2009100145264A
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Chinese (zh)
Inventor
梁新中
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梁新中
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Priority to CNA2009100145264A priority Critical patent/CN101514464A/en
Publication of CN101514464A publication Critical patent/CN101514464A/en
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Abstract

A rolled thin steel plate galvanizing technique comprises the following steps: step 1, unrolling the rolled plate, washing the rolled plate by acid and water, then soaking the rolled plate into electroplating liquid in a galvanizing bath to galvanize, washing the rolled plate by water, then passivating, washing the rolled plate by water again, blowing the plate after being washed with hot water till the plate is dry, and rolling the rolled plate; step 2, content of chemical materials in each liter of electroplating liquid is as follows: 350 to 450 grams of zinc sulfate, 60 to 100 grams of potassium chloride, 25 to 35 grams of buffer and 20 to 30 grams of additive. The pH value of the electroplating liquid is 3 to 4.5 and the temperature is 15 to 60 DEG C. The technical conditions are as follows: the current density is 20 to 50A/dm<2>; and running speed of the electroplated component is 10 to 30 meters per minute. Content of chemical materials in each liter of passivating liquid is as follows: 0.5 to 1.2 grams of chromic anhydride, 0.3 to 1 gram of barium carbonate and 0.8 to 1.5ml of phosphoric acid. Length of the galvanizing bath is 8m and length of the whole electroplating production line is 25m. By the technique the electroplating liquid is not needed to be heated, therefore, the technique saves energy, is safe to operate, has no pollution to environment, and has uniform plated layer and good corrosion resistance.

Description

A kind of rolled thin steel plate galvanizing technique
Technical field
The present invention relates to the electroplating technology technology, relate in particular to the electroplating technology of metal roll bending.
Background technology
The complete processing of existing zinc-plated roll bending, be that (thickness is 0.3~1mm) after anneal with rolling good steel sheet, be immersed in plated surfaces in the hot zinc liquid of zinc bath, about 600 ℃ of the temperature of hot zinc liquid (being commonly referred to as " pot galvanize ") have been plated after washing, have been cooled off rolling again.This process energy consumption is big, the cost height, and there is unsafe factor in contaminate environment easily.Improve rolled thin steel plate overlay coating quality, further strengthen anti-corrosion performance by improving the electroplating technology technology, become roll bending manufacturing common research topic.
Summary of the invention
Purpose of the present invention, the roll bending zincincation of just providing a kind of save energy, reduce cost, surface of thin steel sheet anti-corrosion performance and visual appearance are polluted, improved to operational safety, minimizing.
Task of the present invention is finished like this: study a kind of rolled thin steel plate galvanizing technique, (1) the electroplating technology step is: the roll bending uncoiling, carry out pickling, washing, the electroplate liquid that immerses then in the zinc bath is zinc-plated, roll bending shifts out zinc bath, and water cleans, and immerses in the passivating solution in the deactivation slot and carries out passivation, again through drying up the roll bending rolling after washing, the hot water wash; (2) the chemical proportioning content among the every L of electroplate liquid is: zinc sulfate 350~450g, Repone K 60~100g, buffer reagent 25~35g, additive 20~30g.Electroplate liquid be by proportioning content the chemical that measures is added in the clear water in the zinc bath stir, mixed dissolution makes, the pH value of electroplate liquid is 3~4.5, temperature range is 15~60 ℃.The implementation condition of electroplating technology is: current density 20~50A/dm 2, steel sheet plating piece travelling speed 10~30m/min.The proportioning content of chemical is among the every L of passivating solution in the deactivation slot: chromic trioxide 0.5~1.2g, barium carbonate 0.3~1g, phosphoric acid 0.8~1.5ml.It is zinc-plated to adopt galvanizing technique that rolled thin steel plate is carried out, and will not heat by plating bath, and zinc-plated temperature is a normal temperature, can be called " cold galvanizing ".Compare with traditional " pot galvanize " technology, consume that the plating material is few, coating evenly, firmly, the bright and clean exquisiteness of outward appearance.
Implement test according to above-mentioned process program, prove electroplate liquid reasonable ratio of the present invention, processing step is effective, and is easy to operate, save energy, cost is low, quality good, rolled thin steel plate outward appearance light, corrosion is strong, production process safety, environment protecting is obvious, has reached predetermined purpose preferably.
Embodiment
The invention will be further described below in conjunction with embodiment.Adopt the long lengthening coating bath of 8m, by proportioning content preparation electroplate liquid, in zinc bath, select boric acid 25g, additive to select 25g of sulphur zinc in the every L adding of volume ratio zinc sulfate 400g, Repone K 80g, buffer reagent in the clear water, mix dissolving, the pH value of electroplate liquid is 4, temperature is 25 ℃, and electrical current density is 35A/dm 2The electroplating assembly line head end is a rolled thin steel plate, and the steel sheet after the uncoiling is carried out pickling, washing, enters in the interior immersion plating liquid of lengthening zinc bath, electroplates with the travelling speed of 20m/min.Plating back roll bending moves out of the electro-galvanizing groove, after washing, immerse in the interior passivating solution of deactivation slot, the preparation of passivating solution is by the chemical proportioning content ratio among every L, in the clear water in chromic trioxide 0.8g, barium carbonate 0.5g, the phosphatase 11 ml adding deactivation slot, mix.After transpassivation, roll bending carries out that clear water is washed, hot water wash again, dries up then, at last at the terminal rolling of electroplating assembly line, whole production line length overall 25m.It is zinc-plated to adopt the present invention to be used for rolled thin steel plate, need not heat plating bath, save energy, easy-to-operate, environmentally safe.Steel sheet coating after the plating is even, and solidity to corrosion is strong, and any surface finish is bright flat, exquisiteness attractive in appearance.Compare with traditional " pot galvanize ", the zinc-plated cost of roll bending per ton reduces by 200 yuan, has good economic benefit and promotional value.

Claims (4)

1, a kind of rolled thin steel plate galvanizing technique, it is characterized in that: (one) electroplating technology step is: the roll bending uncoiling, carry out pickling, washing, the electroplate liquid that immerses then in the zinc bath is zinc-plated, roll bending shifts out zinc bath, and water cleans, and immerses in the passivating solution in the deactivation slot and carries out passivation, again through drying up the roll bending rolling after washing, the hot water wash; (2) the chemical proportioning content among the every L of electroplate liquid is: zinc sulfate 350~450g, Repone K 60~100g, buffer reagent 25~35g, additive 20~30g.
2, according to the described rolled thin steel plate galvanizing technique of claim 1, it is characterized in that said electroplate liquid be by proportioning content the chemical that measures is added in the clear water in the zinc bath stir, mixed dissolution makes, the pH value of electroplate liquid is 3~4.5, and temperature range is 15~60 ℃.
3,, it is characterized in that the implementation condition of said electroplating technology is: current density 20~50A/dm according to the described rolled thin steel plate galvanizing technique of claim 1 2, steel sheet plating piece travelling speed 10~30m/min.
4,, it is characterized in that the proportioning content of chemical among the every L of passivating solution in the said deactivation slot is: chromic trioxide 0.5~1.2g, barium carbonate 0.3~1g, phosphoric acid 0.8~1.5ml according to the described rolled thin steel plate galvanizing technique of claim 1.
CNA2009100145264A 2009-03-05 2009-03-05 Rolled thin steel plate galvanizing technique Pending CN101514464A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2009100145264A CN101514464A (en) 2009-03-05 2009-03-05 Rolled thin steel plate galvanizing technique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2009100145264A CN101514464A (en) 2009-03-05 2009-03-05 Rolled thin steel plate galvanizing technique

Publications (1)

Publication Number Publication Date
CN101514464A true CN101514464A (en) 2009-08-26

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CNA2009100145264A Pending CN101514464A (en) 2009-03-05 2009-03-05 Rolled thin steel plate galvanizing technique

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CN (1) CN101514464A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101818369A (en) * 2010-05-07 2010-09-01 东北大学 Technical method of black electrogalvanizing under external field action
CN103215625A (en) * 2012-04-25 2013-07-24 安徽恒晶电缆集团有限公司 Armoured cable steel band electrogalvanizing production technology
CN103526275A (en) * 2013-10-17 2014-01-22 贵州钢绳股份有限公司 Acid-free electrolytic cleaning fluid and application thereof in bethanizing production line
CN105018997A (en) * 2014-04-16 2015-11-04 扬州兴乐电镀设备有限公司 Oil drum galvanizing process
CN106191937A (en) * 2016-08-23 2016-12-07 合肥东方节能科技股份有限公司 A kind of zinc-plated anti-corrosion treatment process of steel surface

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101818369A (en) * 2010-05-07 2010-09-01 东北大学 Technical method of black electrogalvanizing under external field action
CN103215625A (en) * 2012-04-25 2013-07-24 安徽恒晶电缆集团有限公司 Armoured cable steel band electrogalvanizing production technology
CN103526275A (en) * 2013-10-17 2014-01-22 贵州钢绳股份有限公司 Acid-free electrolytic cleaning fluid and application thereof in bethanizing production line
CN105018997A (en) * 2014-04-16 2015-11-04 扬州兴乐电镀设备有限公司 Oil drum galvanizing process
CN106191937A (en) * 2016-08-23 2016-12-07 合肥东方节能科技股份有限公司 A kind of zinc-plated anti-corrosion treatment process of steel surface

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Application publication date: 20090826