Coating composite material type inert anode material and preparation method and application thereof
An inert anode and coating technology, which is applied in the field of metal-based carbide cermet coating composite materials, can solve the problems of poor thermal shock resistance of the anode, difficulty in connecting the anode to the conductive bus plate, and fragility.
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Embodiment 1
[0049] Embodiment 1: 316L stainless steel rods, machined into garden columnar, put into image 3 Electroplating is carried out at the cathode position, and the composition of the plating solution is: NiSO 4 ·6H 2 O: 300 g / L, NiCl 2 ·6H 2 O: 40 g / l, H 3 BO 3 : 35 g / l, WC powder 30 g / l, 12 alkyl sodium sulfate: 0.1 g / l, triammonium citrate: 5 g / l, saccharin 1 g / l, electroplating process conditions: PH=3.0, Bath temperature 40°C, current density: 3.5A / dm 2 . Without starting the mixer, after 12.5 minutes of pre-nickel plating, enter the composite plating stage of starting the mixer. The process of scanning remelting and plasma flame heating is carried out according to the conventional process of plasma flame thermal spraying. After scanning and remelting, the cylindrical composite anode is threaded at one end of the cylindrical column so as to connect with the conductive system.
[0050] according to Image 6 The electrolysis device, install the finished anode in the ano...
Embodiment 2
[0052] Example 2: The electroplated cathode is a 316L stainless steel substrate, and the electroplating solution is composed of NiSO 4 ·6H 2 O: 280 g / L, NiCl 2 ·6H 2 O: 45 g / L, H 3 BO 3 : 35 g / l, WC powder: 20 g / l, sodium lauryl sulfate: 0.1 g / l, triammonium citrate: 5 g / l, saccharin: 1 g / l. The electroplating process conditions are: temperature 30°C, pH 4.0, current density 5A / dm 2 , The pre-nickel plating time is 10 minutes, the rotation speed of the mixer is 110 rpm during composite electroplating (WC-Ni), the composite electroplating time is 8 hours, and the plasma flame is scanned and remelted after electroplating. Other preparation processes of the (WC-Ni) composite anode are the same as in Example 1.
[0053] The prepared (WC-Ni) composite inert anode is machined into a conductive connecting thread, and then installed in the Image 6 The anode position in the shown electrolysis device is used for the aluminum electrolysis test, and the molar ratio of the electrol...
Embodiment 3
[0055] Embodiment 3: garden columnar 316L stainless steel cathodic plating (WC-Ni) coating, electroplating solution is composed:
[0056] NiSO 4 ·6H 2 O: 320 g / L, NiCl 2 ·6H 2 O: 35 g / l, H 3 BO3: 35 g / L, saccharin: 1 g / L. The electroplating process conditions are bath temperature: 50°C: PH value = 5.0, compound electroplating mixer speed: 150 rpm, current density: 2A / dm 2 , Composite electroplating time: 6 hours, before composite electroplating, the pre-nickel plating time of not turning on the mixer is 15 minutes, after electroplating, remelting through plasma flame scanning, other operation steps of anode preparation are the same as embodiment 1.
[0057] The prepared (WC-Ni) coated inert anode, after machining the thread, press Image 6 The electrolysis device was installed at the anode position to carry out the aluminum electrolysis test, and the composition of the aluminum electrolyte and the electrolysis operation process conditions were the same as in Example 1. ...
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