Stripping agent for stainless steel electroplating rack

Abstract

The invention relates to the technical field of electroplating processes, in particular to a stripping agent for a stainless steel electroplating rack. The stripping agent for the stainless steel electroplating rack is prepared from sodium nitrate, potassium sodium tartrate tetrahydrate, boric acid, triethanolamine, glacial acetic acid, thiourea and water and is characterized in that a concentrated solution of the stripping agent comprises the following components in percentage by weight: 6 to 30 percent of sodium nitrate, 0.1 to 8 percent of potassium sodium tartrate tetrahydrate, 5 to 10 percent of triethanolamine, 0.01 to 0.05 percent of thiourea, 1 to 4 percent of boric acid, 0.1 to 2 percent of glacial acetic acid and the balance of water. The process is advanced, and the combined concentrated solution of the stripping agent is colorless and tasteless. During use, the concentrated solution of the stripping agent and water are mixed. During operation, the rack is used as an anode, and a stainless steel plate is used as a cathode; the stripping voltage is 4 to 6V; the hooking and electroplating layer of the rack can be stripped completely in 3 to 5 minutes, harmful gas is not produced, and a hook point is not corroded; and after the rack is stripped completely, the hook point is bright, and limb insulating glue is not damaged.

Description

Technical field: [0001] The invention relates to the technical field of electroplating technology, in particular to a stripping agent for stainless steel electroplating racks. Background technique: [0002] In the field of electroplating technology, the hanging plating of the electroplating line generally uses a hanger (the main body of the hanger is copper metal, and the limbs and hooks are stainless steel. The main body and limbs use organic insulating glue). During electroplating, the current discharges between the hook tip of the hanger and the electroplated product to deposit the coating. Due to multi-layer electroplating, the hanger hook will deposit a layer of electroplating to affect the conductivity of the hanger hook and the electroplated product. Therefore, it must be stripped to make it conductive. There are two traditional stripping methods, one is to strip with manual pliers, and the other is to remove it by nitric acid corrosion. The former surface coating c...

AI Technical Summary

Problems solved by technology

The former surface coating can not be removed, which will deform the hook and damage the insulating glue. The latter is easy to pollute the environment, has a hook that is easy to corrode, and damages the insulating glue. The service life of the hanger is short.

Later, mixed acid and corrosion inhibitor were used to electrolytically remove the coating, and the tip of the hanging tool was prone to internal corrosion, and there was a peculiar smell when the positive and negative electrodes precipitated gas during operation, which could not maintain the performance and service life of the hanging tool.