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Metalcess cathode plate
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Stainless Steel Permanent Cathode Plate (Copper ER & EW)

Metalcess provides 316L stainless steel permanent cathode plate for Copper refining and electrowinning plant. We are a qualified Chinese manufacturer for cathode plate with good quality and nice price. Also we can supply OEM permanent cathode for your Copper electrolysis plant based on your own drawings. If required, we can also manufacture sample cathode plates for test running firstly before formal order. To ensure high quality delivery, clients are invited to China to conduct the factory test together with us. Small quantity and big quantity orders are all welcomed.

General Overview

In the copper electrolytic (and electrowinning) refining process, the permanent stainless steel cathode plates are used as reusable cathodes for metal deposition. The stainless steel cathode plates are composed of conductive rods, stainless steel plates and insulating edge strips.

The permanent stainless steel cathode plate is made of 316L stainless steel plate with a thickness of 3.25mm and a surface roughness of 2B. 316L stainless steel shaped steel tubes are welded on the steel plate, and then a 2.5mm thick copper layer is plated on it to replace the traditional cathode conductive rods in the electrolysis method, serving to suspend the cathode and conduct electricity. There is a very thin permanent oxide layer on the surface of the stainless steel plate, which can well solve the contradiction between the adhesion and stripping of the deposited copper. It can not only prevent the deposited electro-copper from falling off the cathode into the electrolytic cell, but also be easily stripped from the cathode. The two sides of the stainless steel plate are edged with PVC extrusion parts and sealed with high-melting-point wax in the gaps. The bottom edge of the stainless steel plate is dipped in high-melting-point wax.          

The T2 copper is used to produce the hanger bar, the purity copper in T2 copper is 99.90%. The copper rod is tightly surrounded by thestainless-steel tube.

The S.S. 316L permenant cathode plate provided by Metalcess has a service life of 10-15years under normal operation condition.

Performance Indicators
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Performance Indicators

1. Materials

The chemical composition and physical performance indicators of nickel, chromium, molybdenum and carbon in stainless steel shall comply with the provisions of ASTM A240/A240M. 

The chemical composition of T2 copper material shall comply with the provisions of GB/T 5231. The surface roughness (Ra) of stainless steel plate: 0.25 μm to 0.60 μm. 

2. Electrical conductivity

The electric resistance between a point on the copper contact and a point on the center line of bottom of the plate is less than or equal to 0.5 mΩ.The electric resistance between a point on the copper contact and its diagonal line to the bottom of the plate is between 0.01-0. 02 mΩ.

3. Perpendicularity

The perpendicularity of the stainless steel cathode plate shall not be greater than 5 mm. 

4. Sealing performance of insulating edge strips

There shall be no visible water traces penetrating the insulating edge strips. 

5. Clamping force of insulating edge strips

The clamping force shall not be less than 100 N/100 mm. 

6. Axial thrust of insulating edge strips on tensioning rods

The axial thrust shall not be less than 150 N/100 mm. 

7. Temperature resistance performance of insulating edge strips

After being installed, the insulating edge strips shall be placed in a constant temperature test box at (75 ± 3)℃ for 24 hours. The test results shall meet the requirements of the clamping force of insulating edge strips and the axial thrust of insulating edge strips on tensioning rods.

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