ECO-FRIENDLY CHEMICAL CONVERSION TREATMENT METHODS OF MAGNESIUM ALLOY

摘要

The present invention relates to an environmentally friendly conversion treatment method of a magnesium alloy. The present invention provides an environmentally friendly conversion treatment method in which desired physical properties of a magnesium alloy are maintained without discharging a harmful substance. The environmentally friendly conversion treatment method of a magnesium alloy includes: a degreasing step of degreasing the magnesium alloy using ultrasonic waves after depositing the magnesium alloy in a degreasing solution; an etching step of etching the magnesium alloy using an etchant after the degreasing step is completed; a desmut step of performing a desmut process using a desmut solution after the etching step is completed; a conversion treatment step of performing conversion treatment during one to five minutes using a conversion treatment solution containing 3-6 wt% of sodium hydoxide, 6-12 wt% of phosphoric acid, 3-8 wt% of vanadium pentoxide, and 74-88 wt% of distilled water, after the desmut step is completed; a surface adjustment step of adjusting the surface using a surface adjustment solution after the conversion treatment step is completed; and a drying step of drying the magnesium alloy with hot air after the surface adjustment step is completed.