The invention discloses an
electroplating method of high-strength aluminum
alloy for
die casting. The
electroplating method of the high-strength aluminum
alloy for
die casting is characterized in that the high-strength aluminum
alloy comprises the following components in percentages by weight: 7-9% of Zn, 12-14% of Si, 6-8% of Cu, 2-4% of Mn, 0.8-1.2% of Ti, 0.3-0.5% of Re, 3-5% of Mg, 1-3% of Zr, 0.6-0.8% of Ni, and the balance Al and inevitable impurities. The
electroplating method comprises the following steps: (1) pretreatment; (2)
zinc depositing treatment: carrying out
zinc depositing treatment for three times, wherein a
zinc depositing treatment solution comprises the following components: 60-80 g / L of
sodium hydroxide, 40-60 g / L of zinc
oxide, 100-120 g / L of
sodium potassium tartrate tetrahydrate, 3-5 g / L of
ferric chloride and 3-5 g / L of
sodium nitrate, zinc depositing temperature is 30-50 DEG C, and zinc depositing time is 20-40 seconds; (3) electronickelling treatment, wherein an electronickelling solution comprises the following components: 160-180 g / L of NiSO4.6H2O, 0.6-0.8 mol / L of F<->, 20-30 g / L of
boric acid, 22-24 g / L of (NH4)3C6H5O7 and 1-3 g / L of
sodium saccharin, and treatment conditions are as follows: pH value is 4.8-5.4,
current density of a
cathode is 2-4 A / d m<2>, temperature is 45-55 DEG C, and time is 20-30 minutes; and (4)
surface layer nickel,
chromium or
copper plating.