CN102260865A - Metal surface zinc and iron plated alloy and trivalent chromium passivation method - Google Patents

Metal surface zinc and iron plated alloy and trivalent chromium passivation method Download PDF

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Publication number
CN102260865A
CN102260865A CN2010101908326A CN201010190832A CN102260865A CN 102260865 A CN102260865 A CN 102260865A CN 2010101908326 A CN2010101908326 A CN 2010101908326A CN 201010190832 A CN201010190832 A CN 201010190832A CN 102260865 A CN102260865 A CN 102260865A
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grams per
per liters
carry out
concentration
mixing solutions
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CN2010101908326A
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仇士学
陶云峰
蔡宪成
陈建敏
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SHENHAI SPECIAL PLATING CO Ltd NANTONG CITY
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SHENHAI SPECIAL PLATING CO Ltd NANTONG CITY
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Priority to CN2010101908326A priority Critical patent/CN102260865A/en
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Abstract

The invention discloses a metal surface zinc and iron plated alloy and a trivalent chromium passivation method. The method is characterized by comprising the following steps of: (1) removing grease on the surface, (2) removing scale and rust on the surface, (3) removing oil by electrolysis, (4) performing surface activation treatment, (5) plating zinc and iron, (6) plating trivalent chromium and performing passivation treatment, (7) performing seal treatment, and (8) drying, inspecting, packing and warehousing a finished product. The method is applied to anticorrosion coating treatment on the surface of metallic parts of automobiles, motorcycles and the like. The method has the advantages that: the coating is uniform, firm, bright and strong in corrosion resistance, can resist strong corrosion under various severe environments of high-temperature salt mist and the like, has long service life, and remarkably reduces and improves the environmental pollution.

Description

The method of a kind of metallic surface plating decorations zinc-iron alloy and trivalent chromium passivation
Technical field
The present invention relates to a kind of method in metal material surface plating decorations zinc-iron alloy and trivalent chromium passivation.
Background technology
At present to the surface treatment of metalwork erosion resistance, general traditional method is with the zinc-plated plating sexavalent chrome Passivation Treatment of adding, though can play certain corrosion-resistant protective effect, but it is limited that its weak point is a corrosion resistance, part outward appearance after the processing is grown dim, mattness, even more serious is to electroplate the mutagenesis carinogenicity that sexavalent chrome has height, very big to environment and HUMAN HEALTH influence.
Summary of the invention
Easily cause environmental pollution in order to overcome existing metalwork surface plating sexavalent chrome protective coating corrosion resistance finite sum, bring out the cancer various symptoms and signs of deficiency, the invention provides a kind of metallic surface plating decorations zinc-iron alloy and chromic method, the corrosion-resistant protective capacities of coating is strengthened, the coating uniformity, can resist strong corrosion such as various high temperature salt fogs, in plating decorations process, not produce the extremely strong sexavalent chrome of carinogenicity, significantly reduce and improve pollution environment.
The inventive method realizes that the technical scheme that its purpose is taked is, the method for a kind of metallic surface plating decorations zinc-iron alloy and trivalent chromium passivation is characterized in that handling through following process steps:
(1) removes surperficial grease, at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, the concentration of this mixing solutions (grams per liter) is: NaOH 6～30 grams per liters, Na 2CO 38～50 grams per liters, Na 3PO 48～50 grams per liters;
(2) remove surface scale and corrosion, carry out in hydrochloric acid HCl solution, concentration is HCl 10～50 grams per liters;
(3) electrolytic degreasing is at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, this mixing solutions is identical with step (1);
(4) surface activation process is at sulfuric acid H 2SO 4Carry out in the solution, its concentration is 7～50 grams per liters;
(5) galvanized iron is at zinc sulfate ZnSO 4, iron protochloride FeCl 2With carry out in the sodium hydroxide NaOH mixing solutions, the concentration of this mixing solutions (grams per liter) is ZnSO 425～75 grams per liters, FeCl 2110～175 grams per liters, NaOH 50～125 grams per liters;
(6) plating trivalent chromium Passivation Treatment is at chromium sulphate Cr 2(SO 4) 3Carry out in the passivating solution, the concentration of this solution is Cr 2(SO 4) 310～30 grams per liters;
(7) sealing treatment is at the active organic polymer poly of water water glass [Na 2SiO 3] carry out in the n solution, the concentration of this solution is: [Na 2SiO 3] n 40～80 grams per liters;
(8) finished product oven dry test package warehouse-in.
The method of a kind of metallic surface plating decorations zinc-iron alloy and trivalent chromium passivation is characterized in that handling through following process steps:
(1) removes surperficial grease, at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, the concentration of this mixing solutions (grams per liter) is: NaOH 6～25 grams per liters, Na 2CO 310～35 grams per liters, Na 3PO 410～35 grams per liters;
(2) remove surface scale and corrosion, carry out in hydrochloric acid HCl solution, concentration is HCl 10～35 grams per liters;
(3) electrolytic degreasing is at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, this mixing solutions is identical with step (1);
(4) surface activation process is at sulfuric acid H 2SO 4Carry out in the solution, its concentration is 8～35 grams per liters;
(5) galvanized iron is at zinc sulfate ZnSO 4, iron protochloride FeCl 2With carry out in the sodium hydroxide NaOH mixing solutions, the concentration of this mixing solutions (grams per liter) is ZnSO 428～62 grams per liters, FeCl 2116～160 grams per liters, NaOH 60～118 grams per liters;
(6) plating trivalent chromium Passivation Treatment is at chromium sulphate Cr 2(SO 4) 3Carry out in the passivating solution, the concentration of this solution is Cr 2(SO 4) 312～26 grams per liters;
(7) sealing treatment is at the active organic polymer poly of water water glass [Na 2SiO 3] carry out in the n solution, the concentration of this solution is: [Na 2SiO 3] n 50～72 grams per liters;
(8) finished product oven dry test package warehouse-in.
The method of a kind of metallic surface plating decorations zinc-iron alloy and trivalent chromium passivation is characterized in that handling through following process steps:
(1) removes surperficial grease, at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, the concentration of this mixing solutions (grams per liter) is: NaOH 8～13 grams per liters, Na 2CO 312～25 grams per liters, Na 3PO 412～25 grams per liters;
(2) remove surface scale and corrosion, carry out in hydrochloric acid HCl solution, concentration is HCl 12～25 grams per liters;
(3) electrolytic degreasing is at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, this mixing solutions is identical with step (1);
(4) surface activation process is at sulfuric acid H 2SO 4Carry out in the solution, its concentration is 12～25 grams per liters;
(5) galvanized iron is at zinc sulfate ZnSO 4, iron protochloride FeCl 2With carry out in the sodium hydroxide NaOH mixing solutions, the concentration of this mixing solutions (grams per liter) is ZnSO 430～47 grams per liters, FeCl 2120～145 grams per liters, NaOH 67～105 grams per liters;
(6) plating trivalent chromium Passivation Treatment is at chromium sulphate Cr 2(SO 4) 3Carry out in the passivating solution, the concentration of this solution is Cr 2(SO 4) 315～25 grams per liters;
(7) sealing treatment is at the active organic polymer poly of water water glass [Na 2SiO 3] carry out in the n solution, the concentration of this solution is: [Na 2SiO 3] n 57～68 grams per liters;
(8) finished product oven dry test package warehouse-in.
Use the metallic surface plating decorations layer uniformity of the inventive method plating decorations, corrosion-resistant and protection significantly strengthens, and tolerance did not produce white rust in 360 hours in 5% salt-fog test, and tolerating 600 hours does not have red rust to take place.
Embodiment
The method of a kind of metallic surface plating decorations zinc-iron alloy and trivalent chromium passivation is characterized in that handling through following process steps:
(1) removes surperficial grease, at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, the concentration of this mixing solutions (grams per liter) is:
Embodiment 12345
NaOH 6 24 8 13 9
Na 2CO 3 10 35 18 25 13
Na 3PO 4 8 49 35 12 24
(2) remove surface scale and corrosion, carry out in hydrochloric acid HCl solution, its concentration (grams per liter) is:
Embodiment 12345
HCl 10 48 35 24 15
(3) electrolytic degreasing is at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, the concentration of this mixing solutions is identical with above-mentioned steps (1);
(4) surface activation process is at sulfuric acid H 2SO 4Carry out in the solution, its concentration (grams per liter) is:
Embodiment 12345
H 2SO 4 7 50 8 18 25
(5) galvanized iron is at zinc sulfate ZnSO 4, iron protochloride FeCl 2With carry out in the sodium hydroxide NaOH mixing solutions, the concentration of this mixing solutions (grams per liter) is:
Embodiment 12345
ZnSO 4 25 75 28 30 47
FeCl 2 110 170 120 130 145
NaOH 60 118 67 72 105
(6) plating trivalent chromium Passivation Treatment is at chromium sulphate Cr 2(SO 4) 3Carry out in the passivating solution, the concentration of this solution is Cr 2(SO 4) 3(grams per liter) is:
Embodiment 12345
Cr 2(SO 4) 3 10 30 28 15 25
(7) sealing treatment is at the active organic polymer poly of water sodium silicate [Na 2SiO 3] carry out in the n solution, the concentration of this solution for (grams per liter) is:
Embodiment 12345
[Na 2SiO 3]n 40 80 50 72 58
(8) finished product oven dry test package warehouse-in.

Claims (3)

1. the method for adoring zinc-iron alloy and trivalent chromium passivation is plated in a metallic surface, it is characterized in that handling through following process steps:
(1) removes surperficial grease, at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, the concentration of this mixing solutions (grams per liter) is: NaOH 6～30 grams per liters, Na 2CO 38～50 grams per liters, Na 3PO 48～50 grams per liters;
(2) remove surface scale and corrosion, carry out in hydrochloric acid HCl solution, its concentration (grams per liter) is HCl 10～50 grams per liters;
(3) electrolytic degreasing is at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, this mixing solutions is identical with above-mentioned steps (1);
(4) surface activation process is at sulfuric acid H 2SO 4Carry out in the solution, its concentration is 7～50 grams per liters;
(5) galvanized iron is at zinc sulfate ZnSO 4, iron protochloride FeCl 2With carry out in the sodium hydroxide NaOH mixing solutions, the concentration of this mixing solutions is ZnSO 425～75 grams per liters, FeCl 2110～175 grams per liters, NaOH50～125 grams per liters;
(6) plating trivalent chromium Passivation Treatment is at chromium sulphate Cr 2(SO 4) 3Carry out in the passivating solution, the concentration of this solution is Cr 2(SO 4) 310～30 grams per liters;
(7) sealing treatment is at the active organic polymer poly of water sodium silicate [Na 2SiO 3] carry out in the n solution, the concentration of this solution is: [Na 2SiO 3] n 40～80 grams per liters;
(8) finished product oven dry test package warehouse-in.
2. the method for a kind of metallic surface plating decorations zinc-iron alloy according to claim 1 and trivalent chromium passivation is characterized in that handling through following process steps:
(1) removes surperficial grease, at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, the concentration of this mixing solutions (grams per liter) is: NaOH 6～25 grams per liters, Na 2CO 310～35 grams per liters, Na 3PO 410～35 grams per liters;
(2) remove surface scale and corrosion, carry out in hydrochloric acid HCl solution, concentration is HCl 10～35 grams per liters;
(3) electrolytic degreasing is at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, this mixing solutions is identical with above-mentioned steps (1);
(4) surface activation process is at sulfuric acid H 2SO 4Carry out in the solution, its concentration is 8～35 grams per liters;
(5) galvanized iron is at zinc sulfate ZnSO 4, iron protochloride FeCl 2With carry out in the sodium hydroxide NaOH mixing solutions, the concentration of this mixing solutions (grams per liter) is ZnSO 4The 28-62 grams per liter, FeCl 2116～160 grams per liters, NaOH 60～118 grams per liters;
(6) plating trivalent chromium Passivation Treatment is at chromium sulphate Cr 2(SO 4) 3Carry out in the passivating solution, the concentration of this solution is Cr 2(SO 4) 312～26 grams per liters;
(7) sealing treatment is at the active organic composition poly of water water glass [Na 2SiO 3] carry out in the n solution, the concentration of this solution is: [Na 2SiO 3] n 50～72 grams per liters;
(8) finished product oven dry test package warehouse-in.
3. the method for a kind of metallic surface plating decorations zinc-iron alloy according to claim 1 and trivalent chromium passivation is characterized in that handling through following process steps:
(1) removes surperficial grease, at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, the concentration of this mixing solutions (grams per liter) is: NaOH 8～13 grams per liters, Na 2CO 312～25 grams per liters, Na 3PO 412～25 grams per liters;
(2) remove surface scale and corrosion, carry out in hydrochloric acid HCl solution, concentration is HCl 12～25 grams per liters;
(3) electrolytic degreasing is at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, this mixing solutions is identical with above-mentioned steps (1);
(4) surface activation process is at sulfuric acid H 2SO 4Carry out in the solution, its concentration is 12～25 grams per liters;
(5) galvanized iron is at zinc sulfate ZnSO 4, iron protochloride FeCl 2With carry out in the sodium hydroxide NaOH mixing solutions, the concentration of this mixing solutions (grams per liter) is ZnSO 430～47 grams per liters, FeCl 2120～145 grams per liters, NaOH 67～105 grams per liters;
(6) plating trivalent chromium Passivation Treatment is at chromium sulphate Cr 2(SO 4) 3Carry out in the passivating solution, the concentration of this solution is Cr 2(SO 4) 315～25 grams per liters;
(7) sealing treatment is at the active organic composition poly of water water glass [Na 2SiO 3] carry out in the n solution, the concentration of this solution is: [Na 2SiO 3] n 57～68 grams per liters;
(8) finished product oven dry test package warehouse-in.
CN2010101908326A 2010-05-27 2010-05-27 Metal surface zinc and iron plated alloy and trivalent chromium passivation method Pending CN102260865A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104149016A (en) * 2012-11-23 2014-11-19 江苏顺发电热材料有限公司 Treatment process for electric heating pipe
CN110330155A (en) * 2019-08-13 2019-10-15 东北大学 A kind of method of electrolysis-complexing sulfuric acid pickling waste liquid extraction and recovery chromium
CN113566296A (en) * 2020-04-28 2021-10-29 松下知识产权经营株式会社 Air conditioning apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104149016A (en) * 2012-11-23 2014-11-19 江苏顺发电热材料有限公司 Treatment process for electric heating pipe
CN110330155A (en) * 2019-08-13 2019-10-15 东北大学 A kind of method of electrolysis-complexing sulfuric acid pickling waste liquid extraction and recovery chromium
CN113566296A (en) * 2020-04-28 2021-10-29 松下知识产权经营株式会社 Air conditioning apparatus

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Application publication date: 20111130