CN104060310A - Novel zinc-plating and anti-white point corrosion process for casting parts - Google Patents
Novel zinc-plating and anti-white point corrosion process for casting parts Download PDFInfo
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- CN104060310A CN104060310A CN201410226702.1A CN201410226702A CN104060310A CN 104060310 A CN104060310 A CN 104060310A CN 201410226702 A CN201410226702 A CN 201410226702A CN 104060310 A CN104060310 A CN 104060310A
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Abstract
The invention relates to the technical field of zinc plating processes and discloses a novel zinc-plating and anti-white point corrosion process for casting parts. The novel process comprises the following steps: de-oiling, washing by acid, performing acidic zinc plating, performing alkaline zinc plating, polishing, passivating, blanching, sealing and drying. According to the novel process, the casting parts are firstly subjected to acidic zinc plating and alkaline zinc plating in sequence, so that the product performance is improved, the obtained product is good in anti-white point corrosion performance and high in firmness, and the service life of the casting parts is prolonged; the whole process time is shortened, industrial hydrochloric acid is adopted for acid washing, the cost is reduced, and the production efficiency is improved.
Description
Technical field
The present invention relates to zincincation technical field, refer more particularly to the zinc-plated anti-white point corrosion novel process of a kind of cast member.
Background technology
After the transport of cast member product multiparity time, find to occur a large amount of white or grey powder on original bright level and smooth product surface, product blackout, even there is rust staining in serious place.In fact, when the mode that the new cast member having plated is stacked with solid matter stores and transports in environment moist and that draw badly, form the powder corrosion product of white or grey at galvanizing surface, this corrosion product is exactly usually said white rust.Concerning cast member matrix, zinc coating belongs to anodic coating, and it is mainly used in preventing the corrosion of iron and steel, and the quality of its barrier propterty and thickness of coating relation are very large.Zinc coating protects after photo etching through Passivation Treatment, dyeing or coating, can significantly improve its protective and ornamental.But current zincincation exists energy consumption high, galvanized layer thickness lack of homogeneity, white point seriously corroded, solidity is poor, and zinc coating is attractive in appearance not.
Summary of the invention
Technical problem to be solved by this invention is to provide provides a kind of technique simple, the zinc-plated anti-white point corrosion novel process of cast member of galvanized layer thickness good uniformity.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
The zinc-plated anti-white point corrosion novel process of a kind of cast member, is characterized in that, comprises the following steps:
(1) oil removing: cast member is added in degreasing tank, and degreasing powder strength of solution is 60g/L, and solution temperature is 70-80 DEG C, soaks after 5-10 minutes, pulls cast member out, with clear water flushing 3-4 times;
(2) pickling: the cast member after oil removing is put into pickling tank and carry out pickling, technical hydrochloric acid strength of solution is 20-30%, and pickling time is 5-10 minutes, then takes out cast member, with clear water flushing 3-4 times;
(3) acid zinc plating: the cast member after pickling is put into acid zinc plating groove and carry out acid zinc plating, acid zinc plating solution is made up of the zinc chloride of 60-80g/L, the Repone K of 200-240g/L, the boric acid of 20-30g/L, solution temperature is 24-25 DEG C, current efficiency is 5A/kg, treatment time is 20-30 minutes, take out cast member, with clear water flushing 2-3 times;
(4) alkaline zinc plating: the mixing solutions that the sodium hydroxide of the zinc chloride that to put into by concentration be 8-12g/L of the cast member after acid zinc plating, 100-140g/L is formed, treatment time is after 20-30 minutes, takes out cast member and carries out ultrasonic cleaning 2-3 times;
(5) bright dipping: the cast member after alkaline zinc plating is put into salpeter solution, and the treatment time is after 20-25 seconds, takes out cast member, with clear water flushing 1-2 times;
(6) passivation: the cast member after bright dipping is put into the passivating dip that concentration is 5-8mL/L, carry out passivation, solution temperature is 24-25 DEG C, pH value of solution is 2.0-2.5, the treatment time is 20-25 seconds, takes out cast member, with clear water flushing 3-4 times;
(7) blanching: the cast member after passivation is carried out to blanching by hot steam, and heat iron temperature is 80-100 DEG C, the treatment time is 10-15 seconds, then dries;
(8) sealing: the cast member after blanching is put into enclosed slot and enter dipping, the time is 1-3 seconds, and encapsulant strength of solution is 3-5%, then takes out cast member and dries;
(9) dry: the cast member after sealing is dried, and temperature is 80-100 DEG C, and be 5-10 minutes time of drying.
Preferably, the degreasing powder in described step (1) adopts 2033 degreasing powders.
Preferred, the passivating solution in described step (6) adopts trivalent chromium 263 passivating dips.
Beneficial effect of the present invention: cast member is first carried out acid zinc plating processing by (1) the present invention, then carry out alkaline zinc plating processing, improved product performance, the anti-white point corrosive nature of product obtaining is strong, and solid performance is high, has extended the work-ing life of cast member; (2) the present invention has shortened the whole process time, adopts technical hydrochloric acid to carry out pickling, has saved cost, has improved production efficiency.
Brief description of the drawings
Below in conjunction with accompanying drawing, technical scheme of the present invention is further described in detail.
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is further described in detail.
Embodiment mono-:
(1) oil removing: cast member is added in degreasing tank, and 2033 degreasing powder strength of solution are 60g/L, and solution temperature is 80 DEG C, soaked after 10 minutes, pulled cast member out, with clear water flushing 4 times;
(2) pickling: the cast member after oil removing is put into pickling tank and carry out pickling, concentration of hydrochloric acid solution is 30%, and pickling time is 10 minutes, then takes out cast member, with clear water flushing 4 times;
(3) acid zinc plating: the cast member after pickling is put into acid zinc plating groove and carry out acid zinc plating, acid zinc plating solution is made up of the zinc chloride of 80g/L, the Repone K of 240g/L, the boric acid of 20g/L, solution temperature is 24 DEG C, current efficiency is 5A/kg, treatment time is 30 minutes, take out cast member, with clear water flushing 3 times;
(4) alkaline zinc plating: the mixing solutions that the sodium hydroxide of the zinc chloride that to put into by concentration be 12g/L of the cast member after acid zinc plating, 140g/L is formed, the treatment time takes out cast member and carries out ultrasonic cleaning 3 times after being 30 minutes;
(5) bright dipping: the cast member after alkaline zinc plating is put into salpeter solution, and the treatment time is taken out cast member after being 25 seconds, with clear water flushing 2 times;
(6) trivalent chromium passivation: the cast member after bright dipping is put into trivalent chromium 263 passivating dips that concentration is 8mL/L, carry out passivation, solution temperature is 25 DEG C, and pH value of solution is 2.5, and the treatment time is 25 seconds, takes out cast member, with clear water flushing 4 times;
(7) blanching: the cast member after passivation is carried out to blanching by hot steam, and heat iron temperature is 100 DEG C, and the treatment time is 15 seconds, then dries;
(8) sealing: the cast member after blanching is put into enclosed slot and enter dipping, the time is 3 seconds, and encapsulant strength of solution is 5%, then takes out cast member and dries;
(9) dry: the cast member after sealing is dried, and temperature is 100 DEG C, and be 10 minutes time of drying;
(10) general inspection is packed and is waited to load and transport.
Embodiment bis-:
(1) oil removing: cast member is added in degreasing tank, and 2033 degreasing powder strength of solution are 60g/L, and solution temperature is 70 DEG C, soaked after 5 minutes, pulled cast member out, with clear water flushing 3 times;
(2) pickling: the cast member after oil removing is put into pickling tank and carry out pickling, concentration of hydrochloric acid solution is 20%, and pickling time is 5 minutes, then takes out cast member, with clear water flushing 3 times;
(3) acid zinc plating: the cast member after pickling is put into acid zinc plating groove and carry out acid zinc plating, acid zinc plating solution is made up of the zinc chloride of 60g/L, the Repone K of 200g/L, the boric acid of 20g/L, solution temperature is 24 DEG C, current efficiency is 5A/kg, treatment time is 20 minutes, take out cast member, with clear water flushing 2 times;
(4) alkaline zinc plating: the mixing solutions that the sodium hydroxide of the zinc chloride that to put into by concentration be 8g/L of cast member after acid zinc plating, 100g/L is formed, the treatment time takes out cast member and carries out ultrasonic cleaning 2 times after being 20 minutes;
(5) bright dipping: the cast member after alkaline zinc plating is put into salpeter solution, and the treatment time is taken out cast member after being 20 seconds, with clear water flushing 1 time;
(6) trivalent chromium passivation: the cast member after bright dipping is put into trivalent chromium 263 passivating dips that concentration is 5mL/L, carry out passivation, solution temperature is 24 DEG C, and pH value of solution is 2.0, and the treatment time is 20 seconds, takes out cast member, with clear water flushing 3 times;
(7) blanching: the cast member after passivation is carried out to blanching by hot steam, and heat iron temperature is 80 DEG C, and the treatment time is 10 seconds, then dries;
(8) sealing: the cast member after blanching is put into enclosed slot and enter dipping, the time is 1 second, and encapsulant strength of solution is 3%, then takes out cast member and dries;
(9) dry: the cast member after sealing is dried, and temperature is 80 DEG C, and be 5 minutes time of drying;
(10) general inspection is packed and is waited to load and transport.
Embodiment tri-:
(1) oil removing: cast member is added in degreasing tank, and 2033 degreasing powder strength of solution are 60g/L, and solution temperature is 75 DEG C, soaked after 7 minutes, pulled cast member out, with clear water flushing 3 times;
(2) pickling: the cast member after oil removing is put into pickling tank and carry out pickling, concentration of hydrochloric acid solution is 25%, and pickling time is 7 minutes, then takes out cast member, with clear water flushing 3 times;
(3) acid zinc plating: the cast member after pickling is put into acid zinc plating groove and carry out acid zinc plating, acid zinc plating solution is made up of the zinc chloride of 70g/L, the Repone K of 220g/L, the boric acid of 25g/L, solution temperature is 24 DEG C, current efficiency is 5A/kg, treatment time is 25 minutes, take out cast member, with clear water flushing 2 times;
(4) alkaline zinc plating: the mixing solutions that the sodium hydroxide of the zinc chloride that to put into by concentration be 10g/L of cast member after acid zinc plating, 120g/L is formed, the treatment time takes out cast member and carries out ultrasonic cleaning 2 times after being 25 minutes;
(5) bright dipping: the cast member after alkaline zinc plating is put into salpeter solution, and the treatment time is taken out cast member after being 22 seconds, with clear water flushing 2 times;
(6) trivalent chromium passivation: the cast member after bright dipping is put into trivalent chromium 263 passivating dips that concentration is 6mL/L, carry out passivation, solution temperature is 24 DEG C, and pH value of solution is 2.3, and the treatment time is 23 seconds, takes out cast member, with clear water flushing 3 times;
(7) blanching: the cast member after passivation is carried out to blanching by hot steam, and heat iron temperature is 90 DEG C, and the treatment time is 13 seconds, then dries;
(8) sealing: the cast member after blanching is put into enclosed slot and enter dipping, the time is 2 seconds, and encapsulant strength of solution is 4%, then takes out cast member and dries;
(9) dry: the cast member after sealing is dried, and temperature is 90 DEG C, and be 7 minutes time of drying;
(10) general inspection is packed and is waited to load and transport.
Embodiment tetra-:
(1) oil removing: cast member is added in degreasing tank, and 2033 degreasing powder strength of solution are 60g/L, and solution temperature is 78 DEG C, soaked after 9 minutes, pulled cast member out, with clear water flushing 4 times;
(2) pickling: the cast member after oil removing is put into pickling tank and carry out pickling, concentration of hydrochloric acid solution is 28%, and pickling time is 9 minutes, then takes out cast member, with clear water flushing 4 times;
(3) acid zinc plating: the cast member after pickling is put into acid zinc plating groove and carry out acid zinc plating, acid zinc plating solution is made up of the zinc chloride of 75g/L, the Repone K of 230g/L, the boric acid of 28g/L, solution temperature is 25 DEG C, current efficiency is 5A/kg, treatment time is 28 minutes, take out cast member, with clear water flushing 3 times;
(4) alkaline zinc plating: the mixing solutions that the sodium hydroxide of the zinc chloride that to put into by concentration be 11g/L of cast member after acid zinc plating, 130g/L is formed, the treatment time takes out cast member and carries out ultrasonic cleaning 3 times after being 29 minutes;
(5) bright dipping: the cast member after alkaline zinc plating is put into salpeter solution, and the treatment time is taken out cast member after being 24 seconds, with clear water flushing 2 times;
(6) trivalent chromium passivation: the cast member after bright dipping is put into trivalent chromium 263 passivating dips that concentration is 7mL/L, carry out passivation, solution temperature is 25 DEG C, and pH value of solution is 2.4, and the treatment time is 24 seconds, takes out cast member, with clear water flushing 4 times;
(7) blanching: the cast member after passivation is carried out to blanching by hot steam, and heat iron temperature is 95 DEG C, then dries;
(8) sealing: the cast member after blanching is put into enclosed slot and enter dipping, the time is 3 seconds, and encapsulant strength of solution is 4%, then takes out cast member and dries;
(9) dry: the cast member after sealing is dried, and temperature is 95 DEG C, and be 9 minutes time of drying;
(10) general inspection is packed and is waited to load and transport.
Embodiment five:
(1) oil removing: cast member is added in degreasing tank, and 2033 degreasing powder strength of solution are 60g/L, and solution temperature is 72 DEG C, soaked after 6 minutes, pulled cast member out, with clear water flushing 3 times;
(2) pickling: the cast member after oil removing is put into pickling tank and carry out pickling, concentration of hydrochloric acid solution is 20-30%, and pickling time is 6 minutes, then takes out cast member, with clear water flushing 3 times;
(3) acid zinc plating: the cast member after pickling after acid zinc plating is put into acid zinc plating groove and carry out acid zinc plating, acid zinc plating solution is made up of the zinc chloride of 65g/L, the Repone K of 210g/L, the boric acid of 22g/L, solution temperature is 24 DEG C, current efficiency is 5A/kg, treatment time is 22 minutes, take out cast member, with clear water flushing 2 times;
(4) alkaline zinc plating: the mixing solutions that the sodium hydroxide of the cast member zinc chloride that to put into by concentration be 9g/L, 110g/L is formed, the treatment time takes out cast member and carries out ultrasonic cleaning 2 times after being 22 minutes;
(5) bright dipping: the cast member after alkaline zinc plating is put into salpeter solution, and the treatment time is taken out cast member after being 21 seconds, with clear water flushing 1 time;
(6) trivalent chromium passivation: the cast member after bright dipping is put into trivalent chromium 263 passivating dips that concentration is 6mL/L, carry out passivation, solution temperature is 24 DEG C, and pH value of solution is 2.1, and the treatment time is 21 seconds, takes out cast member, with clear water flushing 3 times;
(7) blanching: the cast member after passivation is carried out to blanching by hot steam, and heat iron temperature is 85 DEG C, and the treatment time is 11 seconds, then dries;
(8) sealing: the cast member after blanching is put into enclosed slot and enter dipping, the time is 1 second, and encapsulant strength of solution is 3%, then takes out cast member and dries;
(9) dry: the cast member after sealing is dried, and temperature is 85 DEG C, and be 6 minutes time of drying;
(10) general inspection is packed and is waited to load and transport.
Beneficial effect of the present invention: cast member is first carried out acid zinc plating processing by (1) the present invention, then carry out alkaline zinc plating processing, improved product performance, the anti-white point corrosive nature of product obtaining is strong, and solid performance is high, has extended the work-ing life of cast member; (2) the present invention has shortened the whole process time, adopts technical hydrochloric acid to carry out pickling, has saved cost, has improved production efficiency.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (3)
1. the zinc-plated anti-white point corrosion novel process of cast member, is characterized in that, comprises the following steps:
(1) oil removing: cast member is added in degreasing tank, and degreasing powder strength of solution is 60g/L, and solution temperature is 70-80 DEG C, soaks after 5-10 minutes, pulls cast member out, with clear water flushing 3-4 times;
(2) pickling: the cast member after oil removing is put into pickling tank and carry out pickling, technical hydrochloric acid strength of solution is 20-30%, and pickling time is 5-10 minutes, then takes out cast member, with clear water flushing 3-4 times;
(3) acid zinc plating: the cast member after pickling is put into acid zinc plating groove and carry out acid zinc plating, acid zinc plating solution is made up of the zinc chloride of 60-80g/L, the Repone K of 200-240g/L, the boric acid of 20-30g/L, solution temperature is 24-25 DEG C, current efficiency is 5A/kg, treatment time is 20-30 minutes, take out cast member, with clear water flushing 2-3 times;
(4) alkaline zinc plating: the mixing solutions that the sodium hydroxide of the zinc chloride that to put into by concentration be 8-12g/L of the cast member after acid zinc plating, 100-140g/L is formed, treatment time is after 20-30 minutes, takes out cast member and carries out ultrasonic cleaning 2-3 times;
(5) bright dipping: the cast member after alkaline zinc plating is put into salpeter solution, and the treatment time is after 20-25 seconds, takes out cast member, with clear water flushing 1-2 times;
(6) passivation: the cast member after bright dipping is put into the passivating dip that concentration is 5-8mL/L, carry out passivation, solution temperature is 24-25 DEG C, pH value of solution is 2.0-2.5, the treatment time is 20-25 seconds, takes out cast member, with clear water flushing 3-4 times;
(7) blanching: the cast member after passivation is carried out to blanching by hot steam, and heat iron temperature is 80-100 DEG C, the treatment time is 10-15 seconds, then dries;
(8) sealing: the cast member after blanching is put into enclosed slot and enter dipping, the time is 1-3 seconds, and encapsulant strength of solution is 3-5%, then takes out cast member and dries;
(9) dry: the cast member after sealing is dried, and temperature is 80-100 DEG C, and be 5-10 minutes time of drying.
2. the zinc-plated anti-white point corrosion novel process of cast member according to claim 1, is characterized in that, the degreasing powder in described step (1) adopts 2033 degreasing powders.
3. the zinc-plated anti-white point corrosion novel process of cast member according to claim 1, is characterized in that, the passivating solution in described step (6) adopts trivalent chromium 263 passivating dips.
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| CN105112911A (en) * | 2015-09-09 | 2015-12-02 | 宁波亚大金属表面处理有限公司 | Surface treatment process for cooling water pipe joint assembly |
| CN105132907A (en) * | 2015-09-09 | 2015-12-09 | 宁波亚大金属表面处理有限公司 | Surface treatment process for eye joint of brake pipe |
| CN105132906A (en) * | 2015-09-09 | 2015-12-09 | 宁波亚大金属表面处理有限公司 | Surface treatment process for fuel pipe union assembly of engine |
| CN105506688A (en) * | 2016-01-25 | 2016-04-20 | 广西柳州市龙发金属表面处理技术有限公司 | Preparation process of acid-base compound Magni coating |
| CN106086952A (en) * | 2016-07-29 | 2016-11-09 | 重庆鹏雷汽车配件有限公司 | The rack plating method of trivalent coloured silk zinc |
| CN106283130A (en) * | 2016-08-17 | 2017-01-04 | 安徽红桥金属制造有限公司 | A kind of spring steel zinc-plated anti-white point corrosion new technology |
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| CN111334832A (en) * | 2020-04-16 | 2020-06-26 | 常熟风范电力设备股份有限公司 | Electroplating method with good corrosion resistance of wind power base |
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| CN105112911A (en) * | 2015-09-09 | 2015-12-02 | 宁波亚大金属表面处理有限公司 | Surface treatment process for cooling water pipe joint assembly |
| CN105132907A (en) * | 2015-09-09 | 2015-12-09 | 宁波亚大金属表面处理有限公司 | Surface treatment process for eye joint of brake pipe |
| CN105132906A (en) * | 2015-09-09 | 2015-12-09 | 宁波亚大金属表面处理有限公司 | Surface treatment process for fuel pipe union assembly of engine |
| CN105506688A (en) * | 2016-01-25 | 2016-04-20 | 广西柳州市龙发金属表面处理技术有限公司 | Preparation process of acid-base compound Magni coating |
| CN106086952A (en) * | 2016-07-29 | 2016-11-09 | 重庆鹏雷汽车配件有限公司 | The rack plating method of trivalent coloured silk zinc |
| CN106283130A (en) * | 2016-08-17 | 2017-01-04 | 安徽红桥金属制造有限公司 | A kind of spring steel zinc-plated anti-white point corrosion new technology |
| CN106868506A (en) * | 2017-02-21 | 2017-06-20 | 江阴韩钢铁有限公司 | Fuel tube of automobile production technology |
| CN107299365A (en) * | 2017-06-29 | 2017-10-27 | 十堰市协兴工贸有限公司 | A kind of weldment plates post-passivation process |
| CN108193245A (en) * | 2018-02-02 | 2018-06-22 | 荆大（荆州）汽车配件股份有限公司 | The compound zinc-plated production technology of steel pipe |
| CN109056016A (en) * | 2018-09-11 | 2018-12-21 | 乐清市正鑫金属件有限公司 | Electroplating double-layer zinc technology |
| CN111334832A (en) * | 2020-04-16 | 2020-06-26 | 常熟风范电力设备股份有限公司 | Electroplating method with good corrosion resistance of wind power base |
| CN114657613A (en) * | 2020-12-22 | 2022-06-24 | 苏州普热斯勒先进成型技术有限公司 | Method for manufacturing stamped parts |
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