Hard chrome plating equipment

Hard chrome plating equipment

Hard chrome plating equipment technical process:

Hard chrome plating equipment

Hard chrome plating equipment

A.Introduction of hard chrome plating equipment technical process:

Hard chrome plating equipment used for plating a layer of thick chrome film on various kinds of base material, which its thickness normally above 20μm, by mean of this, to make use of chromium character to improve plating parts hardness, wear resistance, thermostability, anti-corrosion performance.

Hard chrome plating equipment technical features:
1)Cathode current efficiency up to 50%~65%, deposition speed very fast;
2)High hardness plating layer (900~1200 HV), present uniform and intensive net-type fissure, the wear resistance performance is very good;
3)Plating solution disperse capacity good, plating film layer uniform, and not easy to have rough tumour phenomenon, the appearance of chrome layer bright and smooth;
4)Bonding force between chrome plating layer and base material very strong, while pre-plating treatment processes is similar with traditional electroplating technical processes, but operation simple than traditional one;
5)Allowed range of trivalent chromium content is more wide, normally, there is no need to stop production to deal with trivalent chromium;
6)There is no fluoride, no rare earth element in electro plating solution, and no low current area corrosion to plating parts.

Hard chrome plating equipment has a widely application, such as: mechanical mould, cylinder piston, measure tools, cutting and pulling tools etc.. Its another usage is to repair wear down parts and over cutting parts, to make these parts can be used repeat.

B. Hard chrome plating equipment flow:

Examine→Degreaing→Water rinse→Antipole→hard chrome plating→Water rinse→Examine

C. Hard chrome electroplating equipment technical parameter:

1, CrO3: 220~250g/l;
2, SO42-: 2.2~2.5g/l;
3, Cr3+: 2~5g/l;
4, Plating solution temp: 50~55℃;
5, Cathode current density: 30~60A/dm2.

D. Hard chrome plating equipment operation regulations:

1, Examine plating parts size before plating, machining surface conditions, to calculate electro plating time according to electroplating layer thickness.
2, Control well for plating solution working condition, observe frequently, watch temperature changing, plating solution liquid level changing, operation carefully, and fill in the operation record. Add chemical solution according to testing result, correction the electroplating solution.
3, After plating to check plating layer quality, dimensions, and clean up.
4, The working site shall be cleaned and cleared, tools and devices shall be placed properly.

ABS plastic chrome plating machine

ABS plastic chrome plating machine

ABS plastic chrome plating machine technical processes:

ABS chrome plating machine

ABS plastic chrome plating machine Pre-treatment:

Degreasing→(Acid deoiling) hydrophilic→Coarsening →Neutralization→(10% hydrochloric acid)presoak→Palladium→
Activation (dispergation)→(Reduction nickel) Chemical nickel

ABS plastic chrome plating machine After treatment:

(5% hydrochloric acid) Activation→(Pre- copper plating) pyrophosphate copper→(5% sulfuric acid) Activation→
Acid copper→Half brightness nickel→Brightness nickel→Nickel seal→Presoak→Chrome plating→Baking

ABS Plastic plating chrome machine cautions before plating:

1, (Alkaline) degreasing:

Main component constituted by alkali metal compound, such as: sodium hydroxide, sodium carbonate,
potassium carbonate, potassium phosphate etc. Its role is to remove grease or release agent on ABS.

2, (Acid deoiling) hydrophilic:

left;”>The main components are sulfuric acid and hydrophilic agent.The function of sulfuric acid is
neutralization and degreasing; hydrophilic agent is used to provide ABS surface adsorption of hydrophilic
groups, which is beneficial to Coarsening step later.

3, Coarsening:

The major components as chromic acid and sulfuric acid, wetting agents and anti-fogging agents are auxiliary agents. Chromic acid and sulfuric acid which is to get rid of B component from ABS surface to form many tiny pits in favor of Palladium and nickel plating process later; Coarsening effect will direct impact whether can plating layer and binding force between plating coating layer and ABS material body. Wetting agents action is for more effective erosion to ABS material surface, then improve degree ofroughening; antifogging agent role is to prevent the generation of chrome fog, and the environmental impact of the leak-plated of black spots.

Micro arc oxidation

Micro arc oxidation machine

Power Output Voltage: 0V-800V;
Power Maximum output current: 5A, 10A, 30A, 50A, 100A, 200A, 300A, 400A, 500A, etc. optional.

Micro arc oxidation machine basic concept:

Micro arc oxidation (Microarc oxidation, MAO, Micro arc anodizing), also known as micro-plasma oxidation (Microplasma oxidation, MPO), which through a combination of electrolyte and corresponding electrical parameters, depended on impact of instantaneous high temperature & pressure generated by arc discharge, in order to grow out of ceramic coating on surface of aluminum, magnesium, titanium and its alloys based on metal oxide-based as priority. In process of micro arc oxidation, chemical oxidation, electrochemical anodizing, plasma oxidation coexist, so the process of forming of ceramic layer is very complex, so far there is not a reasonable model to fully describe the formation of the ceramic layer.Micro arc oxidation processes lead ordinary anodization from Faraday area introduced into high-pressure discharge area, by mean of this, overcome the shortcomings of hard anodizing, which greatly enhancing the overall performance of film.

Combine of micro-arc oxidation coating with substrate has features of solid, compact structure, high toughness, with good wear resistance, corrosion resistance, heat shock and electrical insulation properties. This kind of technique has advantages of simple operation and easy to realize film layer functions adjustment, and process is not complicated, also does not cause environmental pollution, that is a new environment-friendly surface treatment technology, who has broad application prospects in aerospace, machinery, electronics, decoration and other fields.

2, Micro arc oxidation machine principle and features:

Micro arc oxidation or micro plasma surface ceramic technology, refers to under the basis of general anodization, using arc discharge to enhance and active reactions occurring at the anode, resulting in surface of aluminum, titanium, magnesium and its alloy metal as materials workpiece to form quality reinforced ceramic layer. By using dedicated micro arc oxidation power supply to apply voltage on workpiece, to make interaction of parts surface metal and electrolyte solution, then go generate micro arc discharge on workpieces surface, under influence of factors of high temperature, electric field, etc., the metal surface to form a ceramic layer to reach the surface strengthening purposes.

Micro arc oxidation

Micro arc oxidation

Micro-arc oxidation machine technology features:

(1), Significantly increases materials surface hardness, hardness in 1000 to 2000HV, max. up to 3000HV, even can comparable with hard alloy, the hardness significantly exceed than high carbon steel after heating treatment, heat alloy steel, and high speed tool steel;
(2), Good wear resistance;
(3), Good heat resistance and corrosion resistance. This overcomes fundamental application shortcomes of aluminum, magnesium, titanium material, so the technology has broad application prospects;
(4), Have good insulating properties, insulation resistance up to 100MΩ.
(5), Solution as environmentally friendly and comply with environmental emissions requirements.
(6), Technical process is stable and reliable, simple machinery.
(7), The reaction was carried out at room temperature, easy to operate, easy to master.
(8), Basal body growth ceramic film, combined with a solid, compact and uniform ceramic film.

3, Micro arc oxidation equipment required equipment:

a. Input power:
3 Phase, 380V/415V/440V etc..
b, Micro arc oxidation power dupply:
Due to high voltage requirements (generally between 510-700V), need customized. Usually with silicon transformer.
Power Output Voltage: 0-800V adjustable;
Power Maximum output current: 5A, 10A, 30A, 50A, 100A, etc. optional.
c, Micro arc oxidation tank and ancillary facilities:
Tank can be used PP, PVC and other materials, reinforced with stainless steel outside. Can be applied with cooling facilities outside or cooling liner.
d, hanging jig and cathode materials:
Jigs can use aluminum or aluminum alloy material, cathode material adopts insoluble metal material, stainless steel is recommended.

Micro arc oxidation bath solution:
Focused on aluminum, magnesium, titanium, zirconium, niobium, thallium and other valve metals (valve metal refers a metal to play electrolytic valve role in the electrolyte). Al and Ti can choose the same solution.
a, Oxidizing fluid density: different liquids have different specific gravity, roughly density ranged from 1.0 to 1.1.
b, Oxidizting solution working voltage: 400V-750V.
c, Current density: different liquids, workpieces have different current density. Roughly about: 0.01-0.1 amperes per square decimeter. But there are also a large current existence, and more than 8 amps per square decimeter.
d, Micro arc oxidation time: 10-60 minutes, the longer time, the more dense of film, but also increase the roughness.
e, Liquid PH: alkaline, PH is usually 8-13.
f. Micro-arc oxidation process:
Degreasing —- Water rinse —- Micro arc oxidation —- DI water washing —- Sealing.

Nickel plating machine

Nickel plating machine

Nickel plating machine:

Mainly used for decorative protective coatings. For iron matrix, nickel plating coating film is cathodic type coating. Because of its high porosity, so shall use copper layer as underlying or adopt multi-layer nickel plating. Nickel plating coating layer not bright from the ordinary plating solution, but easy to polish.
Using Ssome brightener can achieve mirror-bright nickel layer. Which is widely used in automobile, bicycle, watch, medical equipment, instrumentation, and household hardware and so on. Part of sulfate-containing sulotion called as sulfate – chloride solution, known as “watt” nickel plating solution, and it is the most widely used in the production.

Nickel plating machine principle:

A method by electrochemically action, deposited layer of nickel on ferrous metal or non-ferrous workpiece surface. Can be used as a surface coating, but mainly for chromium base, to prevent corrosion and increase wear resistance, gloss and appearance looking.Nickel plating is widely used in machinery, equipment, instruments, medical equipment, home appliances, and other manufacturing industries. Use parts for as cathode, pure nickel plate as anode, hang into the solution configurated by nickel sulfate, sodium chloride and boric acid as electrolyte to conduct plate. If add naphthalene disulfonic acid sodium, saccharin, coumarin, p-toluene sulfonamides brightener in the plating solution, can be directly obtained brightness nickel plating layer without mechanical polishing.

Nickel plating in PCB:

Befor gold plating – electroless nickel.
In PCB production, electroless nickel plating is generally done for the next step of gold, of course, there is also a simple nickel plating. Why should the first layer of metal nickel plated before gold plating? It depends on the reactivity of metals, after nickel plating, to ensure the stability of product.

Nickel plating machine

Nickel plating machine

Anodizing machine

Anodizing machine

Anodizing machine for aluminum:

Characteristic of pure aluminum:

Al is amphoteric metal, which is chemically active and easy to generate oxide in air, while aluminum oxide can inhibit further oxidation, the higher purity of aluminum, the more uniform film, and more excellent corrosion resistance. Easy to act with reducing agent. But anti-corrosion to oxidizing agent. Aluminum is passive state to concentrated nitric acid.

A Definition:

Aluminum in the ambient atmosphere will produce a layer of oxide film. Aluminum substrate attached to anode current to generate hard and transparent surface layer in electrolyte, this electro chemical reaction is called as “anodizing”, which is finished by anodizing machine.

B Features of anodizing:

Transparent, close to the glass; Insulation, anti-static; Changeable color appearance; Fully integrated with the aluminum surface and does not peel off. NOTE: Passivation is made for stainless steel surface treatment, as the same purpose to increase the corrosion resistance.

C Anodizing machine application functions:

Increase corrosion resistance; Increase abrasion resistance; Improve the adhesion of the substrate and coating; Provide an insulating surface; Insulation; Protection polishing surface and machined surface; Improve appearance. Note: After the oxidation can be painted, but generally do not suggest to do this process, because it is uneconomical. Usually to realize color when oxidation, basically except white, other colors are available by this deal, and it will not affect the film thickness (or the thickness of the substrate). These are functions of anodizing machine.

D Anodizing machine technical processes:

Anodizing machine

Anodizing machine

In briefly, anodizing machine divided into 2 big steps: Pre-treatment and After treatment.

Pre-treatment: Include degreasing, etching, chemical polishing, etc. Oxidation: once the surface is prepared, the oxidation film is built. After treatment: porous anodizing film can be colored in this stage. Sealing.