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Nickel plating additive for water electrolysis plate
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An additive, water electrolysis technology, applied in the field of auxiliary solution, can solve the problems such as threats to personnel and equipment safety, high cost, inter-connection of oxyhydrogen gas, etc., to achieve the effect of improving brightness, improving corrosion resistance, and precise structure
Active Publication Date: 2016-04-06
ENG EQUIP CO LTD SUZHOU SAI SIDE
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Problems solved by technology
Once the plates are severely corroded, it will lead to hydrogen and oxygen gas interconnection, alkali leakage and electrical short circuit, which may cause an explosion and threaten the safety of personnel and equipment.
[0005] The main salt of the commonly used nickel plating solution is nickel sulfate, and the reducing agent is sodium hypophosphite. If this nickel plating solution is used alone, the quality of the obtained coating is not high.
In order to improve the smoothness and corrosion resistance of the coating, at present, the general practice is to add a small amount of complexing agent, corrosion inhibitor, and surfactant to the nickel plating solution to improve the quality of the coating, but the effects are mixed and the cost is high.
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Embodiment 1）
[0016] The nickel plating additive for water electrolysis plate of the present embodiment comprises the following components: 20wt% α-glycolic acid, 10wt% lactic acid, 0.1wt% benzotriazole, 0.3wt% sodium lauryl sulfate, 20wt% sodium acetate, 1wt% 1,4-butynediol, and the rest are water, and the pH value is adjusted to 4 with sodium hydroxide.
[0017] The nickel-plating additive for water electrolysis polar plate of the present embodiment, when in use, adds this additive of 10ml / L in the electroplating solution that nickel sulfate and sodium hypophosphite are prepared, and according to the consumption rate of plating solution, constantly replenishes.
Embodiment 2）
[0019] The nickel plating additive for water electrolysis plate of the present embodiment comprises the following components: 15wt% 2-hydroxypropanetricarboxylic acid, 15wt% lactic acid, 0.2wt% potassium iodide, 0.2wt% sodium dodecylbenzenesulfonate , 25wt% sodium acetate, 1.5wt% 1,4-butynediol, the rest is water, adjust the pH value to 4.5 with ammonia water.
[0020] The nickel-plating additive for water electrolysis polar plate of the present embodiment, when in use, adds 12ml / L in the electroplating solution that nickel sulfate and sodium hypophosphite are prepared, and constantly replenishes according to the consumption rate of plating solution.
Embodiment 3）
[0022] The nickel plating additive for water electrolysis plate of the present embodiment comprises the following components: 25wt% of diaminomonocarboxylic acid, 12wt% of lactic acid, 0.05wt% of methyl benzotriazole, 0.1wt% of sodium n-octyl sulfate , 30wt% sodium acetate, 0.8wt% triarylmethane dye, the rest is water, and the pH value is adjusted to 5 with glacial acetic acid.
[0023] The nickel-plating additive for water electrolytic plate of the present embodiment, when in use, adds 8ml / L in the electroplating solution that nickel sulfate and sodium hypophosphite are prepared, and constantly replenishes according to the consumption rate of the plating solution.
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PUM
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Abstract
The invention relates to a water electrolysis pole plate nickel-plating additive, comprising the following components: 10wt% to 25wt% of hydroxyl carboxylic acid or amino carboxylic acid, 5wt% to 15wt% of lactic acid, 0.05wt% to 0.2wt% of corrosion inhibitor, 0.02wt% to 0.1wt% of surfactant, 20wt% to 30wt% of buffer agent, 0.2wt% to 2wt% of brightener and the balance of water; the pH value of the additive is 4 to 5.5; and the amount of the additive in 1L plating liquid is 8 ml to 15 ml. The water electrolysis pole plate nickel-plating additive belongs to the technical field of metal plating. Through the application of water electrolysis pole plate nickel-plating additive provided by the invention, the nickel-plating layer can be compact, uniform and bright, and high in the bonding strength and stronger in corrosion resistance.
Description
technical field [0001] The invention relates to an auxiliary solvent added when nickel-plating the surface of a carbon steel pole plate, and belongs to the technical field of metal plating. Background technique [0002] Water electrolysis is to decompose water into hydrogen or oxygen under the action of direct current. The electrolyzer is one of the core devices in the whole set of water electrolysis equipment. The water electrolyzers commonly used in industry are composed of dozens to hundreds of electrolysis chambers stacked according to the rules. Each electrolysis cell is composed of an anode plate, an oxygen catalytic electrode, a gas barrier diaphragm, an insulating sealing gasket, a hydrogen catalytic electrode, and a cathode plate. The anode and cathode plates are usually made of carbon steel plates. [0003] Since the electrolyte composed of strongly acidic electrolytes is highly corrosive to metals, the electrolyte of the electrolytic cell generally uses a potas...
Claims
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