CN101392396B - Process for forming peak-like convex nickel coating on surface of metal substrate - Google Patents

Process for forming peak-like convex nickel coating on surface of metal substrate Download PDF

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Publication number
CN101392396B
CN101392396B CN2008102012667A CN200810201266A CN101392396B CN 101392396 B CN101392396 B CN 101392396B CN 2008102012667 A CN2008102012667 A CN 2008102012667A CN 200810201266 A CN200810201266 A CN 200810201266A CN 101392396 B CN101392396 B CN 101392396B
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parts
plating
portions
convex
leveling agent
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CN2008102012667A
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CN101392396A (en
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林文松
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Shanghai University of Engineering Science
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Shanghai University of Engineering Science
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Abstract

The invention relates to the technical field of surface treatment, in particular to a preparation process of forming peak-shaped raised nickel plating on the surface of a metallic substrate; the preparation process is characterized in that: the following weight portions of materials: 200 to 380 portions of NiSO4.6H2O, 320 to 500 portions of NiCl2.6H2O, 50 to 100 portions of NaH2PO2.H2O and 100 to300 portions of H3BO3 are adopted to prepare into a basic plating solution; 2 to 5 portions of sodium benzene sulfanate and 5-8 portions of sulfanilic acid are mixed into a minus leveling agent; the minus leveling agent are added into the basic plating solution to prepare finished plating solution; and an electrolytic nickel sheet is used as the anode and the to-be-plated metal substrate as the cathode for the electroplating. Compared with the prior art, the technique is simple and the obtained Ni plated layer has the advantages of obvious peak-shaped raised surface shape, good compactness and excellent combination with the substrate.

Description

Form the preparation technology of peak-like convex nickel coating at metal base surface
[technical field]
The invention belongs to the performance processing technology field, a kind of specifically preparation technology who forms peak-like convex nickel coating at metal base surface.
[technical background]
Electroplate and be called galvanic deposit again, be under the effect of DC electric field, constituting the loop by anode, negative electrode and electrolyte solution (plating bath), make the solution metal ion deposition to the lip-deep process of negative electrode plating piece, is one of main method that obtains at material surface metal plating.
Generally, electroplate the means as material surface modifying, main application is to improve the solidity to corrosion and/or the wear resistance of body material, or is to make body material obtain certain decorative effect.Therefore, most electroplating technologies require to obtain having the coating of uniform thickness on matrix.
In order to improve the homogeneity of thickness of coating, generally adopt the processing method that in plating bath, adds leveling agent.Its principle is after adding leveling agent, and the current density of the recess on the electrode surface will be greater than the current density of convex protrusion place, and this moment is in the thickness of coating of the recess thickness of coating greater than convex protrusion place.Studies show that to have only on electrode, to adsorb and electrodeposition process is played the additive that resistance turns usefulness into just to have the leveling effect; The leveling ability of additive is closely related with its cathodic polarization ability, has only the additive that increases cathodic polarization just might play the leveling effect, has negative leveling effect and reduce the polar material.
Occupy above-mentioned principle, can adopt to change the plating bath essentially consist, strengthen chlorine ion concentration, add suitable additive, adjust the methods such as distance between negative electrode and the anode, obtain a kind of coating of peak-like convex shape characteristic, and become a kind of method for preparing double metallic composite material.Usually at this second kind of metal of matrix surface deposition with peak-like convex, can adopt technologies such as soldering, surfacing, compound casting or powder metallurgy, compare with these technologies, the present invention has that technological operation is simple, low temperature is synthetic, the characteristics of wide accommodation.
[summary of the invention]
The objective of the invention is to overcome the deficiencies in the prior art, the nickel plating solution that adopts unique component to form, and in plating bath, add an amount of negative leveling additive, under suitable electroplating technical conditions, a kind of nickel coating of preparation on steel and other metallic matrixes with peak-like convex shape characteristic, and become a kind of method for preparing double metallic composite material.
For achieving the above object, design a kind of preparation technology, it is characterized in that: (1) basic plating bath preparation: take by weighing raw material NiSO according to following ratio of weight and number at metal base surface formation peak-like convex nickel coating 46H 2O200~380 part, NiCl 26H 2O320~500 part, NaH 2PO 2H 2O50~100 part, H 3BO 3100~300 parts, above-mentioned each raw material umber adds up to 1000 parts, joins then in 1000 parts of water, carries out magnetic agitation to evenly under 80 ℃, obtains blended basis plating bath; (2) negative leveling agent configuration; 2~5 parts of benzene sulfinic acid sodium salts, 5~8 parts of Sulphanilic Acid, perhaps 4~10 parts of benzene sulfinic acid sodium salts, 10~16 parts of Sulphanilic Acid are stand-by after mixing; (3) finished plating solution configuration: the negative leveling agent that will prepare joins in the basic plating bath for 20 parts, obtains finished plating solution; (4) plating pre-treatment: the metal substrate preprocess is become concavo-convex pattern, and carry out the clean and activation treatment of electricity; (5) plating: employing purity surpasses 99.9% electrolytic nickel sheet as anode, and metal substrate to be plated is electroplated as negative electrode, and galvanized current density is 2.5~10A/dm 2, the distance between anode and the negative electrode is 3~15mm, bath pH value 3.5~5.0, and temperature is 45~65 ℃.
Described plating is direct current electrode position or pulse plating.
Described metallic matrix comprises various steel and other metals of plane and curved surface pattern.
Compared with prior art, technology of the present invention is simple, and gained Ni coating has significant peak-like convex shape characteristic, and the coating densification, with substrate good combination is arranged.
[embodiment]
Below the invention will be further described.
Embodiment 1
With NiSO 46H 2O300g, NiCl 26H 2O500g, NaH 2PO 2H 2O50g, H 3BO 3150g joins in the 1000ml water, carries out magnetic agitation under 80 ℃, obtains basic plating bath after stirring; Taking by weighing benzene sulfinic acid sodium salt 10g in the container in addition, Sulphanilic Acid 10g mixes and makes negative leveling agent; It is joined in the above-mentioned basic plating bath, continue to stir the finished plating solution that plating bath 30min is uniformly mixed.With having carried out carbon steel coupon ultrasonic cleaning 15min in acetone soln that concave-convex surface is handled in advance, take out with after the washed with de-ionized water, in 10%HCl solution, behind the processing 1min, rinse well repeatedly with deionized water.Adopt sheet nickel as anode.Insert in the pole plate fixed support handling clean yin, yang pole plate, guarantee that positive plate and negative plate keep the constant distance of 5mm and parallel relative in electroplating process; Plating tank is put into the electric heating constant temperature water-bath, adjust electroplate liquid to 60 ℃.Steel disc (negative electrode) and electrolytic nickel (anode) are inserted constant current power supply, and being adjusted to cathode current density is 3A/dm 2Behind the plating 240min, the steel disc taking-up is cleaned up with clear water.Obtain the significant nickel coating of concavo-convex pattern at last on the carbon steel coupon surface.
Embodiment 2
With NiSO 46H 2O280g, NiCl 26H 2O450g, NaH 2PO 2H 2O70g, H 3BO 3200g joins in the 1000ml water, carries out magnetic agitation at 80 ℃ and obtains basic plating bath; Taking by weighing benzene sulfinic acid sodium salt 12g in the container in addition, Sulphanilic Acid 8g mixes and makes negative leveling agent, will bear leveling agent and join in the above-mentioned basic plating bath, continues to stir the finished plating solution that plating bath 30min is uniformly mixed.With having carried out copper sheet ultrasonic cleaning 15min in acetone soln that concave-convex surface is handled in advance, take out with after the washed with de-ionized water, in 10%HCI solution, rinse well repeatedly with deionized water behind the processing 1min.Adopt sheet nickel as anode.Insert in the pole plate fixed support handling clean yin, yang pole plate, guarantee that positive plate and negative plate keep the constant distance of 3mm and parallel relative in electroplating process; Plating tank is put into the electric heating constant temperature water-bath, adjust electroplate liquid to 60 ℃.Carbon steel coupon (negative electrode) and electrolytic nickel (anode) are inserted constant current power supply, and being adjusted to cathode current density is 2.5A/dm 2Behind the plating 240min, the steel disc taking-up is cleaned up with clear water.Obtain the significant nickel coating of concavo-convex pattern at last on the steel disc surface.
Embodiment 3
Electroplate liquid formulation, plating pre-treatment, plating technology parameter are with embodiment 1, and the steel disc among the embodiment 1 changes Φ 12 carbon steels into, and carry out annular knurl at the rod iron outside surface and handle.Anode is used sheet nickel instead and is prepared into Φ 20 tubuloses.Cathode steel bar is placed the anode tube center, carry out plating according to the electroplating technology identical with embodiment 1 after, obtain the significant nickel coating of concavo-convex pattern at the rod iron outside surface at last.

Claims (2)

1. the preparation technology at metal base surface formation peak-like convex nickel coating is characterized in that: (1) basic plating bath preparation: take by weighing raw material NiSO according to following ratio of weight and number 46H 2200~380 parts of O, NiCl 26H 2320~500 parts of O, NaH 2PO 2H 2O50~100 part, H 3BO 3100~300 parts, above-mentioned each raw material umber adds up to 1000 parts, joins then in 1000 parts of water, carries out magnetic agitation to evenly under 80 ℃, obtains blended basis plating bath; (2) negative leveling agent configuration: 4~10 parts of benzene sulfinic acid sodium salts, 10~16 parts of Sulphanilic Acid, stand-by after mixing; (3) finished plating solution configuration: the negative leveling agent that will prepare joins in the basic plating bath for 20 parts, obtains finished plating solution; (4) plating pre-treatment: the metal substrate preprocess is become concavo-convex pattern, and carry out the clean and activation treatment of electricity; (5) plating: employing purity surpasses 99.9% electrolytic nickel sheet as anode, and metal substrate to be plated is electroplated as negative electrode, and galvanized current density is 2.5~10A/dm 2, the distance between anode and the negative electrode is 3~15mm, bath pH value 3.5~5.0, and temperature is 45~65 ℃.
2. a kind of preparation technology at metal base surface formation peak-like convex nickel coating as claimed in claim 1, it is characterized in that: described plating is direct current electrode position or pulse plating.
CN2008102012667A 2008-10-16 2008-10-16 Process for forming peak-like convex nickel coating on surface of metal substrate Expired - Fee Related CN101392396B (en)

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Publication number Priority date Publication date Assignee Title
CN101831675B (en) * 2010-05-21 2012-03-14 南通市申海特种镀饰有限责任公司 Nickel plating process for superconducting materials
CN104005061B (en) * 2014-06-05 2016-05-18 中节能太阳能科技有限公司 A kind of negative leveling agent for electrode plating copper before solar cell
CN104947095B (en) * 2015-05-29 2017-11-14 北京吉瑞恒升科技有限公司 A kind of chemical plating fluid and chemical plating method for preparing nickel plating thorn diamond abrasive grain
CN104894614B (en) * 2015-05-29 2019-05-10 北京吉瑞恒升科技有限公司 A kind of electroplate liquid and electro-plating method producing nickel plating thorn abrasive grain
CN105951133A (en) * 2016-06-14 2016-09-21 浙江工业大学义乌科学技术研究院有限公司 Alkaline electrolyte and nickel electroplating method in alkaline system
CN105908223A (en) * 2016-06-14 2016-08-31 浙江工业大学义乌科学技术研究院有限公司 Alkaline electrolyte and method for preparing bright nickel by means of electrolysis in alkaline electrolyte

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