Stainless steel electrolytic polishing

Stainless steel electrolytic polishing:

Stainless steel electrolytic polishing machine mainly for stainless steel parts surface brightness treatment. Stainless steel electro polishing use workpiece as an anode, insoluble metal as cathode, 2 poles immersed in the bath at the same time, with direct current to generate selective anodic dissolution, the workpieces surface will gradually leveling, so as to increase surface brightness effect.

Rectifier: 3 phase 380V, rectifier current, according to customer workpiece size. Operating voltage 8-20v.

Stainless steel electrolytic polishing principle:

Stainless steel electrolytic polishing major recognized theory is mucosal theory. Which is: the metal ion break away from workpiece with phosphoric acid form a layer of phosphate film adsorbed on workpieces surface, this mucous membrane is thinner in the projections while thicker in recess, because the projections high current density then dissolved quickly, with the mucous membrane fluidity, changing irregularities, the roughened surface is gradually become leveling process.

Stainless steel electro polishing advantages:

⑴ Same color of inside and outside, gloss retention, mechanical polishing can not get the recess be leveled.
⑵ High production efficiency, low cost.
⑶ Increase surface corrosion resistance, suitable for all stainless steel.

Stainless steel electroplating polishing conditions required:

Power waveform requirements are not strict, can choose of SCR type or high frequency plating rectifier.

Electropolishing tank and mating facilities (anode rod):

Hard PVC plates welded together. Bath top 3 electrode rods, the middle of movable anode rod, then connect with anode (or positive), both sides as cathode pole, connect with power cathode (negative).

Facilities of heating and cooling equipment:

① Heating can use quartz heating tube, or titanium heating tube.
② Cooling can use coil tube, heating coil can heat and cool.

Stainless steel polishing machine hanger:

It is best to select titanium hanger, because titanium is more resistant to corrosion, long serve life, titanium ions has no effect on the bath. It is suggested not to use copper hanger, because when copper ions into stainless steel surface will generate a layer of bad bonding force copper layer, then impact the polishing quality.

Anode and cathode materials:

Cathode and anode rods adopt copper or brass, brass tube length plus 20cm longer than electrolytic bath, cathode plate use lead plate, fixed to the cathode rod, height plus 10 cm than tank height, lead plate width decided according to bath length, generally 10cm, 20cm.

Stainless steel polishing machine mainly for stainless steel parts surface brightness treatment. Stainless steel workpiece are 200 series, 300 series, 400 series material, each serie has the targeted electro polishing chemical solution.

Stainless steel electrolytic polishing process: degreasing – washing – anti rust – washing – electrolytic polishing – washing – passivation – packaging.
Stainless steel electrolytic polishing

Stainless steel electrolytic polishing

Rectifier to England

Our rectifier delivery to England, customer says quality very good, and he need more and more.

Rectifier to England

Rectifier to England

Rectifier in South Africa

Our company 1000A rectifier power supply working well in South Africa customer’s plating machine workshop.


Input voltage: 3 Phase, 50Hz, 380V

Output current: 0-1000A adjustable

Output voltage: 0-12V.

The plating power supply working well, South Africa customer is satisfied with our rectifier, and says will purchase more and more.

Plating rectifier

Plating rectifier South Africa

Electroplating rectifier

Electroplating rectifier


Electroplating rectifier greenization:

Electroplating rectifier system greenization have profound meaning:
The first is significant energy-saving, which means save power generation capacity, while power generation is an important cause of environmental pollution, so power saving can reduce environmental pollution; and secondly these power can not (or less) generates pollution to power grid, International Electrotechnical Commission (IEC) has developed a series of standards such as IEC555, IEC917, IECl000. In fact, many power electronic energy-saving equipment, often turn into sources of pollution on the grid: inject to grid of serious harmonic current, make the total power factor drops, so many glitches coupling grid voltage spikes and peaks, even chipping and distortion. In end of 20th century, a variety of active filter and active compensator was born, with a variety of power factor correction method. Laid the foundation for mass production of a variety of green switching power supply in 21 century.

Modern power electronics technology is the basis for development of electroplating rectifier:

Modern power electronics is the basis for development of electroplating rectifier technology. With the continuous emergence of new power electronic devices and adapted to more higher switching frequency circuit topology, modern power supply technology driven by real needs will be rapid developped. In traditional application technique, due to the performance limits of power leaving, switching power supply device performance is affected. Greatly put to good use of characteristics of various power devices, minimize device performance impact on switching mode rectifier, new power circuit topology and new control technology enables power switching at zero voltage or zero current state, which can greatly increase the operating frequency, improve work efficiency of switching mode power supply, then design excellent performance switch mode power supply.

More electroplating rectifier waiting to be developed:

In short, power electronics and switching electroplating rectifier technology continues to move forward due to application requirements, the emergence of new technologies will make many applications replacement products, but also to open up more and new applications. High frequency rectifier switching power supply, modular, digital, greenization etc., will mark these technologies as mature, to realize high efficiency and high-quality electricity application combined. In recent years, with the development of the communications industry, switch power technology as the core of communications switching power supply, only the domestic market demand of more than 20 billion yuan, has attracted a large number of scientific and technical personnel to develop research. Switching power supply instead of linear power and phase control power supply is the trend and will soon be developed. There are many other in switching power supply technology as the core of a dedicated power supply, industrial power are waiting for people to develop.

Electroplating rectifier

Electroplating rectifier

IGBT rectifier

IGBT rectifier


Briefly of IGBT rectifier:

Through comprehensive analysis of the equivalent circuit to simplify explain cumbersome IGBT working principle and the role, and noted IGBT characteristics. It can be said, IGBT is a switching device either on or off, it combine both advantages of of MOSFET’s high input impedance and GTR’s low conduction voltage drop.

IGBT Rectifier constitution:

IGBT (insulated gate bipolar transistor), constituted of BJT (bipolar transistor) and MOS (insulated gate field effect transistor) composite full-controlled type voltage-driven power semiconductor devices, with high input impedance MOSFET and GTR’s low on-state voltage drop down. GTR saturation pressure drop, carrier high current density, but the drive current is large; MOSFET drive power is very small, fast switching speed, but large conducting voltage drop, the carrier density is small.
IGBT combines advantages of these two devices, the driving power is small and the saturation while voltage drop low. Very suitable for the DC voltage of 600V and above, variable flow systems such as AC motor, inverter, switching power supply, lighting circuits, traction drive and other fields.
Insulated gate bipolar transistor (IGBT) is the youngest one of high voltage switch family. A 15V high-impedance voltage source facilitate control current flow through the device which can achieve a lower control power to control the high current.

IGBT rectifier principle and action:

Simply to say, IGBT is a switch, either on or off, how to control its on or off, by the gate-source voltage, when the gate-source plus +12V (greater than 6V, generally take 12V to 15V) the IGBT conducting, gate source voltage is not applied or is applied negative pressure, IGBT turn-off, a negative pressure purpose is reliably shut off. No amplified voltage IGBT function, turn on can be seen as the wire, other as open circuit when disconnected.

IGBT rectifier conduct/insulation electricity:

IGBT has three terminals, namely, G, D, S, G and S ends apply voltage, the internal electrons transfer (characteristic of the semiconductor material, which is the reason why use semiconductor material as power electronic switch), originally correspondence of positive and negative ions, semiconductor material in neutral, but applied voltage, electrons under the influence of voltage, accumulation to one side, forming a layer of conductive channel, because the electron is electrically conductive, becomes a conductor . If remove applied both ends voltage of GS, this layer of conductive channel disappear, do not conduct electricity, and become insulators. This is pass of IGBT rectifier.

IGBT rectifier