Electrochemical treatment liquid and application thereof

The invention belongs to the field of chemical electroplating, and particularly relates to electrochemical treatment liquid and an application thereof, in particular to the electrochemical treatment liquid for processing a workpiece after laser engraving. The electrochemical treatment liquid of the present invention comprises the following components in parts by weight: 270-640 parts of sulfuric acid, 940-1300 parts of phosphoric acid, 4-10 parts of 5-phenyltetrazole, 2-10 parts of a brightener, and 4-12 parts of glycine. When the laser-engraved workpiece is treated with the electrochemical treatment liquid of the present invention, an oxide layer formed on the workpiece can be removed, and re-oxidation of the workpiece is not generated; when the laser-engraved workpiece is treated by theelectrochemical treatment liquid of the invention, the workpiece body is not affected, and the pattern structure of the workpiece is not deformed; when the laser-engraved workpiece is treated with theelectrochemical treatment