Patent ID: 7833403

Claim:
An electroplating, chemical plating method using partial chemical oxidation for an aluminum or aluminum copper radiator comprising the following steps: Step 1: pretreatment to the radiator: applying degreasing, water rinsing, weak erosion by lye, water rinsing, acid liquor washing for surface brightness, and water rinsing; Step 2: partial chemical oxidation to the radiator: immersing a part of the radiator for no plating into an oxidization trough containing a solution with an oxidant, a part of the radiator for plating is above the solution surface to avoid oxidization, after the part of the radiator for no plating is oxidized, a surface thereof is covered with a colorless porous film; Step 3: water rinsing; Step 4: enclosure: immersing the radiator in an enclosed trench with a water solution containing a sealing compound, after the radiator is enclosed, tiny holes of the porous film on the part of the radiator for no plating are filled up with the sealing compound to form a film against erosion of acid or alkali on the radiator surface; Step 5: water rinsing; Step 6: weak erosion, putting whole of the radiator in lye and conducting weak erosion to the part of the radiator for plating; Step 7: water rinsing; Step 8: acid liquor washing for surface brightness; Step 9: water rinsing; Step 10: twice galvanizations: conducting galvanization, water rinsing, zinc removal by acid cleaning, second galvanization, and water rinsing; Step 11: plating nickel-phosphorus alloy: conducting chemical plating or electroplating for the radiator, only a part not covered by the film against erosion is plated with nickel-phosphorus alloy, thereby the part of the radiator for plating is plated with the nickel-phosphorus alloy; Step 12: post-treatment, then conducting water rinsing, drying and parching to the radiator; and Step 13: finished product.