CN1281787C - Magnesium and magnesium alloy high corrosion resitance composite cladding and its preparing process - Google Patents

Magnesium and magnesium alloy high corrosion resitance composite cladding and its preparing process Download PDF

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Publication number
CN1281787C
CN1281787C CN 200410018471 CN200410018471A CN1281787C CN 1281787 C CN1281787 C CN 1281787C CN 200410018471 CN200410018471 CN 200410018471 CN 200410018471 A CN200410018471 A CN 200410018471A CN 1281787 C CN1281787 C CN 1281787C
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magnesium
coating
nickel
plating
alloy
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CN1580325A (en
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刘新宽
胡文彬
丁文江
向阳辉
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
    • 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601—Process or apparatus
    • C23C18/1633—Process of electroless plating
    • C23C18/1646—Characteristics of the product obtained
    • C23C18/165—Multilayered product
    • C23C18/1653—Two or more layers with at least one layer obtained by electroless plating and one layer obtained by electroplating
    • 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31—Coating with metals
    • C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
    • C23C18/34—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents
    • C23C18/36—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents using hypophosphites
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
    • C23C28/025—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only with at least one zinc-based layer
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys
    • C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc

Abstract

The present invention relates to a composite coating with high erosion resistance and a preparing process thereof for magnesium and magnesium alloy, which is used in the technical field of surface treatment of non-ferrous material. A chemical nickel-plating layer is used as a bottom layer of the composite coating, an electroplating zinc-nickel alloy layer is used as a surface layer of the composite coating, wherein the thickness of the chemical nickel-plating layer is from 20 mu to 25 mu, and the thickness of the electroplating zinc-nickel alloy layer is from 8 mu to 10 mu. The process comprises the following steps: nickel is chemically plated on magnesium alloy by using the B480-88 of the ASTM standard, wherein the plating time is from 1.4 hours to 2 hours, the thickness of the coating is from 20 mu to 25 mu, and the coating contains 9 to 12% of phosphorus; zinc-nickel alloy is electroplated; the used plating soulution is prepared from the components of the following process condition: 8 to 15% of sodium hydroxide, 2 to 5% of zinc oxide, 0.5 to 3% of nickel chloride, 2 to 4% of ethylene diamine, 2 to 4% of trolamine, 0.5 to 3% of potassium sodium tartrate tetrahydrate, 0.2 to 0.8% of DE, 0.01 to 0.1% of sodium dodecanesulphonate and water as the rest; the current density is from 0.5 A/dm<2> to 5 A/dm<2>, the electroplating time is 30 minutes, and the coating contains 13 to 18% of nickel; a black passivation process for zinc-nickel alloy is used. The thickness of the composite coating of the present invention is not larger than 35 mu. The composite coating has good corrosion resistance, and the durable time of neutral salt mist can reach 1000 hours. The coating obtained by the present invention can be used as a protective layer for magnesium and magnesium alloy in severe rugged environment.

Description

Magnesium and magnesium alloy high anti-corrosion composite deposite and preparation technology thereof
Technical field
The present invention relates to metal composite cladding and preparation technology thereof, specifically is a kind of magnesium and magnesium alloy high anti-corrosion composite deposite and preparation technology thereof.Be used for the nonferrous metal material surface process field.
Background technology
Magnesium alloy is a structural metallic materials the lightest in the practical application, it is little to have proportion, specific tenacity, specific rigidity height, advantages such as damping and amortization, machinability, good casting property are just obtaining increasingly extensive application at aspects such as automobile, machinery, aerospace field and portable electronic appliance, computer, hand-operated tools and camera components.But the solidity to corrosion of magnesium alloy is very poor.Several overlay coatings of having developed such as electroless plating or electrolytic coating, its anti-corrosion protection effect is limited.Even the chemical plating that solidity to corrosion is good, rolled up for the 6th phase in 2002 31 in " surface treatment " as people such as Ye Hong, deliver " chemical nickel plating process on magnesium alloy research " literary composition on the 32-35 page or leaf, introduce magnesium alloy chemical newly developed and plated the single durable time of coating neutral salt spray and be about 300 hours, obviously also can't satisfy the solidity to corrosion requirement under the severe rugged environment.For improving corrosion resistance of coating, usually adopt the way that increases thickness of coating, referring to U.S. material association magnesium and the special-purpose handbook of magnesium alloy, published in 1999 (ASM Specialty Handbook Magnesium and Magnesium Alloys.1999), in severe rugged environment, chromium coating and copper-nickel-chromium coating minimum thickness that handbook is recommended are 64 microns.
On steel substrate, developed the good coating of a lot of solidity to corrosions, as admiro.But because the high electrochemical activity of magnesium and corroded fast by most of plating baths, these technologies can not be applied directly on the magnesium alloy.And the corrosion potential of magnesium is very low, and electroless plating commonly used or electrolytic coating all belong to negative electrode to magnesium alloy, the sacrificial protection of iron and steel is applied to just become galvanic protection on the magnesium alloy, and the principle of design of coating will change.Anticathode coating, gratifying solidity to corrosion, especially under the severe rugged environment, only when the coating atresia, just can reach, and magnesium and magnesium alloy major part be with castings production, can produce inevitably be mingled with, loosen, defective such as pore, the defective of cast(ing) surface has a strong impact on the quality of coating, be difficult to avoid coating hole not occur, it is to be difficult to sealing that these holes rely on single electroless plating or electroplating process.The not high reason of magnesium alloy corrosion resistance of coating that Here it is.
Summary of the invention
The objective of the invention is to the shortcoming at existing magnesium alloy corrosion resistance of coating difference, a kind of magnesium and magnesium alloy high anti-corrosion composite deposite and preparation technology thereof are provided, its thickness of coating is no more than 35 microns, and the anti-neutral salt spray time of coating can reach more than 1000 hours.
The present invention is achieved through the following technical solutions, and magnesium of the present invention and magnesium alloy high anti-corrosion composite deposite comprise chemical Ni-plating layer, electroplated zinc nickel alloy layer; Chemical Ni-plating layer is made bottom, and thickness is the 20-25 micron, and the electroplated zinc nickel alloy layer is the top layer, and thickness is the 8-10 micron, and the coating total thickness is no more than 35 microns.Wherein the chemical Ni-plating layer phosphorus content is 8-12%, and electroplated zinc nickel alloy layer nickel content is 13-18%.
Adopt the magnesium alloy chemical depositing process, plating one deck nickel protects the magnesium substrate earlier as substrate on magnesium alloy substrate.And nickel coating can be compatible with standard electric coating, on nickel substrate, just can develop the coating of high anti-corrosion.
Next solves coating pore problem.By chemical plating, the hole in the coating is reduced to very low degree.The thickness of chemical Ni-plating layer is selected between the 20-25 micron, and thickness is too thin, and the degree that hole reduces is limited; Thickness is too thick, and coating fragility increases, and cost also increases greatly.And some hole can't cover all the time by chemical plating, and the thickness of coating increase just loses meaning.These holes just lean on electrolytic coating sealing subsequently.Adopt the alkali plating solution electroplated zinc nickel alloy, utilize plating bath strong leveling effect and dissemination, can fill out the hole that do not have chemical plating and its sealing.Chemical Ni-plating layer itself is just very fine and close, adds follow-up electroplated zinc nickel alloy, just can solve coating mesoporosity problem.As long as magnesium alloy substrate is coated fully, the advantage that top layer zn-ni alloy deposits solidity to corrosion is good just can be given full play of.
The preparation technology of high anti-corrosion composite deposite of the present invention may further comprise the steps:
(1) chemically coating nickel by magnesium-alloy.Chemical plating technology adopts the B480-88 of ASTM standard.Plating time is 1.4-2 hour, and thickness of coating is the 20-25 micron, and the coating phosphorus content is about 8-12%.
(2) electroplated zinc nickel alloy.It is as follows to electroplate plating bath composition (weight percent) and the processing condition used in the zinc-nickel technology: sodium hydroxide 8-15%, zinc oxide 2-5%, nickelous chloride 0.5-3%, quadrol 2-4%, trolamine 2-4%, Seignette salt 0.5-3%, DE0.2-0.8%, sodium laurylsulfonate 0.01-0.1%, surplus is a water.Current density is 0.5-5A/dm 2, electroplating time is 30 minutes.Anode adopts stainless steel plate, and temperature is a room temperature.
The plating bath that uses in the electroplated zinc nickel alloy technology is formed (weight percent) and optimal process is: sodium hydroxide 11-13%, zinc oxide 3-5%, nickelous chloride 1.2-1.7%, quadrol 2.5-3.5%, trolamine 2.5-3.5%, Seignette salt 1.2-1.7%, DE0.3-0.5%, sodium laurylsulfonate 0.02-0.04%, surplus is a water.Current density is 2.5A/dm 2, electroplating time is 30 minutes.The thickness of coating that obtains is at the 8-10 micron, and nickel content is about 13-18%.
(3) coating black passivation.The black passivation treatment process adopts the admiro black inactivation process.
Compare with existing magnesium alloy coating, it is fine to the invention has the advantages that thickness of multiple plating is no more than under 35 microns conditions solidity to corrosion, and the salt-fog resistant test time can reach 1000 hours.The coating that utilizes the present invention to obtain can be used as the protective layer of magnesium and magnesium alloy in the severe rugged environment.
Embodiment
The invention will be further described below by embodiment.
Embodiment one:
Magnesium alloy AZ91 foundry goods is used chemical plating technology plating 2 hours, and obtaining thickness of coating is 25 microns, and the chemical Ni-plating layer phosphorus content is about 9%.Then according to following prescription and technology electroplated zinc nickel alloy: sodium hydroxide 15%, zinc oxide 5%, nickelous chloride 3%, quadrol 4%, trolamine 4%, Seignette salt 0.5%, DE0.8%, sodium laurylsulfonate 0.03%, surplus is a water.Current density is 2.5A/dm 2, electroplating time is 30 minutes.Anode adopts stainless steel plate, and temperature is a room temperature.The zn-ni alloy deposits thickness that obtains is the 8-10 micron, and nickel content is about 15%.Last coating is handled through black passivation.About 35 microns of coating total thickness.
Carry out neutral salt spray test according to ASTM B117 standard, the durable time can reach more than 1000 hours.
Embodiment two
Use chemical plating technology plating 1.4 hours with magnesium alloy AZ91 foundry goods, obtaining thickness of coating is 20 microns, and the chemical Ni-plating layer phosphorus content is about 9%.Then according to following prescription and technology electroplated zinc nickel alloy: sodium hydroxide 8%, zinc oxide 2%, nickelous chloride 0.5%, quadrol 2%, trolamine 2%, Seignette salt 3%, DE0.2%, sodium laurylsulfonate 0.01%, surplus is a water.Current density is 2.5A/dm 2, anode adopts stainless steel plate, and temperature is a room temperature.Electroplating time is 30 minutes, and the zn-ni alloy deposits thickness that obtains is the 8-10 micron, and nickel content is about 13%.Last coating black passivation is handled.The coating total thickness is about 30 microns.
Carry out neutral salt spray test according to ASTM B117 standard, the durable time can reach 800 hours.
Embodiment three
Magnesium alloy AZ91 foundry goods is used chemical plating technology plating 2 hours, and obtaining thickness of coating is 25 microns, and the chemical Ni-plating layer phosphorus content is about 9%.Then according to following prescription and technology electroplated zinc nickel alloy: sodium hydroxide 12%, zinc oxide 4%, nickelous chloride 1.5%, quadrol 3%, trolamine 3%, Seignette salt 1.5%, DE0.4%, sodium laurylsulfonate 0.03%, surplus is a water.Current density is 2.5A/dm 2, electroplating time is 30 minutes.Anode adopts stainless steel plate, and temperature is a room temperature.The zn-ni alloy deposits thickness that obtains is the 8-10 micron, and nickel content is about 16%.Last coating is handled through black passivation.About 35 microns of coating total thickness.
Carry out neutral salt spray test according to ASTM B117 standard, the durable time can reach more than 1000 hours.
Embodiment four:
Magnesium alloy AZ91 foundry goods is used chemical plating technology plating 2 hours, and obtaining thickness of coating is 25 microns, and the chemical Ni-plating layer phosphorus content is about 9%.Then according to following prescription and technology electroplated zinc nickel alloy: sodium hydroxide 11%, zinc oxide 3%, nickelous chloride 1.2%, quadrol 2.5%, trolamine 2.5%, Seignette salt 1.7%, DE0.3%, sodium laurylsulfonate 0.02%, surplus is a water.Current density is 2.5A/dm 2, electroplating time is 30 minutes.Anode adopts stainless steel plate, and temperature is a room temperature.The zn-ni alloy deposits thickness that obtains is the 8-10 micron, and nickel content is about 15%.Last coating is handled through black passivation.About 35 microns of coating total thickness.
Carry out neutral salt spray test according to ASTM B117 standard, the durable time can reach more than 1000 hours.
Embodiment five:
Magnesium alloy AZ91 foundry goods is used chemical plating technology plating 2 hours, and obtaining thickness of coating is that 25 microns chemical Ni-plating layer phosphorus contents are about 9%.Then according to following prescription and technology electroplated zinc nickel alloy: sodium hydroxide 13%, zinc oxide 5%, nickelous chloride 1.7%, quadrol 3.5%, trolamine 3.5%, Seignette salt 1.2%, DE 0.3%, sodium laurylsulfonate 0.04%, surplus is a water.Current density is 2.5A/dm 2, electroplating time is 30 minutes.Anode adopts stainless steel plate, and temperature is a room temperature.The zn-ni alloy deposits thickness that obtains is the 8-10 micron, and nickel content is about 15%.Last coating is handled through black passivation.About 35 microns of coating total thickness.
Carry out neutral salt spray test according to ASTM B117 standard, the durable time can reach more than 1000 hours.

Claims (5)

1, a kind of magnesium and magnesium alloy composite deposite comprise: chemical Ni-plating layer, electroplated zinc nickel alloy layer, it is characterized in that chemical Ni-plating layer is made bottom, and thickness is the 20-25 micron, and the electroplated zinc nickel alloy layer is the top layer, and thickness is the 8-10 micron.
2, magnesium according to claim 1 and magnesium alloy composite deposite is characterized in that, the chemical Ni-plating layer phosphorus content is 8-12%.
3, magnesium according to claim 1 and magnesium alloy composite deposite is characterized in that, electroplated zinc nickel alloy layer nickel content is 13-18%.
4, the preparation technology of a kind of magnesium and magnesium alloy composite deposite is characterized in that, comprises three steps:
(1) chemically coating nickel by magnesium-alloy: plating time is 1.4-2 hour, and thickness of coating is the 20-25 micron, and phosphorus content is 8-12%;
(2) electroplated zinc nickel alloy: plating bath composition and the processing condition used in the electroplated zinc nickel alloy technology are as follows: sodium hydroxide 8-15%, zinc oxide 2-5%, nickelous chloride 0.5-3%, quadrol 2-4%, trolamine 2-4%, Seignette salt 0.5-3%, DE 0.2-0.8%, sodium laurylsulfonate 0.01-0.1%, surplus is a water, current density is 0.5-5A/dm 2, electroplating time is 30 minutes, and anode adopts stainless steel plate, and temperature is a room temperature;
(3) coating black passivation: the black passivation treatment process adopts the admiro black inactivation process.
5, the preparation technology of magnesium according to claim 4 and magnesium alloy composite deposite, it is characterized in that, the plating bath that uses in the described electroplated zinc nickel alloy technology is formed and technology is: sodium hydroxide 11-13%, zinc oxide 3-5%, nickelous chloride 1.2-1.7%, quadrol 2.5-3.5%, trolamine 2.5-3.5%, Seignette salt 1.2-1.7%, DE 0.3-0.5%, sodium laurylsulfonate 0.02-0.04%, current density is 2.5A/dm 2
CN 200410018471 2004-05-20 2004-05-20 Magnesium and magnesium alloy high corrosion resitance composite cladding and its preparing process Expired - Fee Related CN1281787C (en)

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CN100408725C (en) * 2005-12-30 2008-08-06 东北大学 Process for compound surface sheilding of metal magnesium and magnesium alloy
CN101294283B (en) * 2007-04-29 2010-08-25 比亚迪股份有限公司 Method for processing magnesium alloy surface
CN102312238A (en) * 2011-09-28 2012-01-11 中国计量学院 Preparation of zinc nickel plating layer and trivalent chromium passivation process thereof
CN103898588A (en) * 2013-06-04 2014-07-02 无锡市锡山区鹅湖镇荡口青荡金属制品厂 Magnesium alloy surface chemical nickel-plating combination solution for pre-electroplated zinc-nickel alloy
CN103710692A (en) * 2013-12-20 2014-04-09 苏州市邦成电子科技有限公司 Preparation method of corrosion-resistant SUS301 stainless steel band
CN106282822B (en) * 2016-08-24 2018-03-13 宁波亚大金属表面处理有限公司 A kind of processing technology of petroleum pipeline
PL3415665T3 (en) * 2017-06-14 2024-03-25 Dr.Ing. Max Schlötter Gmbh & Co. Kg Method for the galvanic deposition of zinc-nickel alloy layers from an alkaline zinc-nickel alloy bath with reduced degradation of additives
DE102021126252A1 (en) 2021-10-11 2023-04-13 Maco Technologie Gmbh Layer system and method for producing a layer system

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