Dynamic chemical nickel-plating method and dynamic chemical nickel-plating device

Abstract

The invention discloses a dynamic chemical nickel-plating method and dynamic chemical nickel-plating device. The nickel-plating method comprises a preplating treatment and a nickel-plating procedure, wherein preplating treatment comprises organic oil removing, cold water rinsing, alkali oil removing, hot water rinsing, weak corrosion and deionized water flushing; and the nickel-plating procedure comprises activating, deionized water flushing, chemical nickel-plating and deionized water flushing. The nickel-plating device comprises a servo motor, a hanging sleeve, a constant-temperature water bath case and a coating bath, wherein the hanging sleeve is of a hollow tube structure; a plurality of plating parts are inserted on the hanging sleeve; and the motor drives the hanging sleeve to lead the plating parts to rotate for plating. The device has a simple structure, is high in yield and low in energy consumption, and is convenient to operate and especially suitable for inner and outer surface nickel plating of variable cross-section bent tube and small-diameter metal tube fittings.

Description

technical field [0001] The invention belongs to an electroless nickel plating method and a device thereof, in particular to a dynamic electroless nickel plating method and a device suitable for metal pipe fittings with variable cross-sections, bends and small diameters. Background technique [0002] Electroless nickel plating is a reduction process. The correct preparation process of the substrate surface is very important to obtain a qualified electroless nickel plating layer. The corrosion resistance of the electroless nickel plating layer is one of the main reasons for its application. This coating is based on It is completely covered to prevent corrosion, unlike the zinc coating that corrodes itself to protect the substrate. Because of this, the coating must be complete, and a reasonable and effective pre-plating treatment process is the guarantee of this integrity. In recent years, the application technology of electroless Ni-P alloy plating has also been rapidly impro...

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Problems solved by technology

Second, due to the fact that part of the hydrogen gas released during the plating process of metal parts with variable cross-sections, elbows, and small diameters cannot be discharged, which seriously affects the quality of the plating layer, and sometimes even cannot be plated.

Therefore, the electroless nickel plating on the inner and outer surfaces of special-shaped pipe fittings is still quite difficult. The research scope of electroless nickel plating technology in this field at home and abroad is limited, and there is still a distance from practical use, especially for variable cross-section, curved pipes, and small diameter parts. Surface electroless nickel plating process and equipment research has not been reported

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