Method of alloy surface treatment

Abstract

A alloy surface treatment includes dewaxing and deoiling to an alloy surface via a cleaning process; sealing holes on the alloy surface with an organic material; forming a first coating on the alloy surface with a UV curing material; providing a plasma treatment to activate the alloy surface, then providing a PVD process to form a second coating outside the alloy; forming a third coating on the alloy surface with another UV curing material which further includes a toner therein, then forming a fourth coating on the alloy surface with the UV curing material, wherein the toner is provided to match the color of hexavalent-chromium to obtain a hexavalent-chromium imitated product.

What is claimed is:  
     
         1 . An surface treatment comprising:
 dewaxing and deoiling to an alloy surface by using of a cleaning process;   sealing holes on the alloy surface with an organic material;   forming a first coating outside the alloy surface with a first passive curing material;   providing a plasma treatment to activate the alloy surface, then providing a PVD process to form a second coating outside the alloy surface;   forming a third coating outside the alloy surface with a second passive curing material which further comprises a toner therein, then forming a fourth coating outside the alloy surface with a third passive curing material.   
     
     
         2 . The surface treatment of  claim 1 , wherein the cleaning process is selected from a group consisted of hydrogen-carbon vacuum cleaning, dry ice cleaning and factious cleaning. 
     
     
         3 . The surface treatment of  claim 2 , wherein the organic material is related to a silanes fluid. 
     
     
         4 . The surface treatment of  claim 3 , wherein the first, second and the third passive material are related to an UV curing paint. 
     
     
         5 . The surface treatment of  claim 4 , wherein the plasma treatment is operated according to the control parameters of that the ion source current is 0.3˜0.5 A; the biasing is 80˜150V; the Mark-Space ratio is 50˜80%; the argon gas flow velocity is 10˜100 SCCM; the oxygen flow velocity is 10˜150 SCCM; the pressure of the plasma environment is 0.3 Pa; and the activation time is 5˜10 minutes. 
     
     
         6 . The surface treatment of  claim 5 , wherein the PVD is operated according to the control parameters of that the operating current is 50˜300 A; the operating voltage is 400˜800V; the deposing time is 5˜10 minutes; the biasing is 20˜60V; the Mark-Space ratio is 50˜80%; the argon gas flow velocity is 60˜200 SCCM; the oxygen flow velocity is 0˜100 SCCM; and the nitrogen gas flow velocity is 0˜100 SCCM, furthermore the coating material for the PVD process is selected from a group consisted of aluminum, chromium, indium, tin, antimony and silver. 
     
     
         7 . The surface treatment of  claim 6 , wherein the toner is provided to match the color of hexavalent-chromium. 
     
     
         8 . The surface treatment of  claim 7 , wherein the sealing holes process is to soak the alloy in the silanes fluid for 5˜120 seconds and dry the alloy at the temperature 100˜150° C., where the silanes fluid is proportionally consisted of KH-560, deionized water and ethanol, which is in the ratio of (2˜4):5:(91˜93). 
     
     
         9 . The surface treatment of  claim 8 , wherein the first, the third and the fourth coatings are able to be solidified and leveled respectively via an UV radiation reaction for 10˜45 seconds and a baking process at temperature 50˜70° C. for 3˜10 minutes, where the UV radiation energy is 500˜1500 mJ/cm 2 . 
     
     
         10 . The surface treatment of  claim 9 , wherein the UV curing paint is a polyurethane acrylate.