Lead alloy electrode plate, preparation method and anode plate

Abstract

The invention discloses a lead alloy electrode plate, which comprises a carbon steel core plate, the surface of the carbon steel core plate is coated with a lead alloy layer, and is characterized in that: the mass percentage composition of the lead alloy layer is as follows: Sb: 3 ~8wt%, Bi: 0.3 ~ 0.8wt%, Ce-La misch metal: 0.5 ~ 0.8wt%, and the rest are Pb and inevitable impurities. The invention controls the content of Sb, Bi, Ce-La mixed rare earth and lead in the lead alloy layer, the lead alloy layer has uniform structure, high material density, good corrosion resistance, and a service life of more than 12 months.

Description

technical field [0001] The invention belongs to the technical field of electrode plates, and particularly relates to a lead alloy electrode plate, a preparation method and an anode plate. Background technique [0002] Lead alloy electrode plate is applied to pickling line of cold-rolled stainless steel strip, using neutral salt Na 2 SO 4 The solution is used as an electrolyte for electrolytic removal of scaly oxides on the surface of the steel strip, that is, the chemical action of the electrolyte is ensured through electron migration and the process is accelerated. In this electrolysis reaction, since the electrolyte does not directly participate in the chemical reaction, theoretically the electrolyte No consumption, only water is consumed. Through the above electrochemical reaction, the main component of the stainless steel scale is Cr 2 O 3 It is removed in the form of metal hydroxide after electrolysis, and the waste electrolyte can be regenerated and reused without ...

AI Technical Summary

Problems solved by technology

The assembly process of the existing anode plate is as follows: a plurality of carbon steel core plates laid side by side are connected after welding at the bottom, and then a lead alloy layer is coated on the surface of the carbon steel core plates, and the assembled electrolytic capacitor device is as follows: figure 1 As shown, the electrolytic capacitor device assembled in this way has the following problems: 1) When the welded part is unevenly stressed and subjected to a large external stress, it is easy to cause deformation and microcracks in the lead alloy layer, and fluid is easily formed here during the electrolytic pickling process. The relatively retarded and blocked area provides favorable conditions for pitting corrosion and becomes the priority development area of ​​pitting corrosion, further forming large cracks on the surface of the corrosion product, so that the corrosive medium can contact the core plate of the metal matrix through the cracks, resulting in under-deposit corrosion , accelerates the corrosion of the core plate of the electrode plate, and causes deformation and fracture of the electrode plate. In this case, the electrode plate must be replaced, otherwise the steel belt is easy to be damaged during the operation of the steel belt, and there is a great risk of production accidents and safety hazards; 2) in a certain If a single piece of lead alloy electrode plate is severely corroded, the entire electrolytic capacitor device needs to be scrapped, greatly increasing production costs

[0005] The service life of the existing electrolytic capacitor device is about 4 to 6 months. Therefore, the service life of the existing lead alloy electrode plate and the electrolytic capacitor device needs to be further improved

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