The hardness and toughness of the electroplated heating tube are higher than those of the bright nickel coating

The hardness and toughness of the electroplated heating tube are higher than those of the bright nickel coating

Nickel-iron alloy can be directly plated on steel parts without copper primer, which simplifies the process, prevents the highly toxic cyanide copper plating process using sodium cyanide as a complexing agent, achieves the purpose of cyanide-free electroplating, and improves the situation Purify. At the same time, the harmless iron impurities in the nickel-iron plating solution can be converted into a favorable nickel-iron coating, which has poor characteristics. Its hardness and toughness are higher than that of bright nickel coating. The individual nickel-iron hardness is HV5688MPa-6669MPa. Due to its good toughness, it will not fall off even if it is plated off and cut, and the electroplated nickel-iron coating on the flat plate can get full brightness. antecedent.

Electroplating electric heating tube anti-corrosion listen well

Good corrosion resistance, bright nickel-iron coating + microporous chrome (using NI-Fe/satin nickel/chromium, its chrome layer is microporous chrome or chrome layer anode electrolysis), its corrosion resistance is better than bright nickel + chrome plating Even better. In order to further improve the corrosion resistance and prevent the occurrence of yellow spots, the nickel-iron alloy coating is often used as a double-layer nickel-iron alloy coating, that is, a layer of nickel-iron alloy containing 30-40% iron is first plated on the steel (referred to as high-iron alloy). Then a layer of nickel-iron alloy containing iron-0-5% (simply referred to as low-iron alloy) is plated. The best high iron alloy accounts for two-thirds of the total thickness of the alloy coating. The purpose of low-iron alloy plating on high-iron alloy is to prevent the occurrence of yellow spots in the corrosion solution of nickel-iron alloy plating) and to make the potential of low-iron alloy more positive than that of high-iron. The corrosion process can expand laterally like double layer nickel, thus improving corrosion resistance.

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