( A ) prior to the new technologyof  Diamond Cutting Discs is the highest hardness , sharpness better abrasive currently found . Plating method using diamond abrasives "plating out " on the metal substrate , instead of the traditional casting sintering method, only low investment costs , but also avoids oxidation of diamond at high temperatures to ensure the hardness and sharpness of the diamond .
Throughout the diamond plating process, more than 90 % of the plating layer with poor treatment due to adverse due before plating . Therefore, to improve the quality of the plating , the most important is to do the plating pretreatment .
Content plating pretreatment generally include: degreasing , rust , erosion , pickling, cleaning and activation plus auxiliary electrode and mounted pegs . In order to improve the coating quality , through the electroplating industry at home and abroad are analyzed and compared with the actual , developed a new treatment before plating process is as follows : deburring cleaning coated thermal insulation plastic scrub chemical degreasing , pickling cold water rinse in cold water power chemical degreasing wash anodized flushed into the slot. 1 with sandpaper and hand deburring file to remove the burrs on the workpiece to prevent the workpiece surface showing the bad state of the dielectric .
2 . Cleaned with alcohol to scrub the workpiece again, initially remove oil workpiece surface.
3 plastic insulation coating of the workpiece after the scrubbing in the non- coated portion coated with adhesive fast , non-plating portions so insulated . 4 To prevent the need to scrub plated parts are coated with plastic insulation, hand file or sandpaper to polish the parts and then again, and then rinse.
5 degreasing chemical degreaser formula. Sodium hydroxide has a strong saponification , animal and vegetable oil reacts with soluble flying soap and glycerin. THF is a surface active agent call , in which synergistic dodecyl sulfate group and a hydrophobic group to be hydrophilic , the lower the surface tension between the liquid and the work . It is used as a caustic additive to accelerate the degreasing speed. Sodium carbonate and sodium silicate are two kinds of buffers from the buffer at an acid to make the PH value of the liquid melt is substantially maintained edges. And the workpiece is set in the above solution , in the case of 40 ℃ ~ 60 ℃ cleaned for 30 minutes. 6 hot , cold rinse first with hot water , rinse with cold in the book , except to avoid oil into the acid solution. 7 pickling acid liquid formulation for the purpose of removing the oxide surface of the substrate .
8 After the cold water pickling , the workpiece clip out , rinse with cold water , then hang electrochemical degreasing tank installed .
9 spark school electrochemical degreasing formulations Degreaser racking their work in this solution , then with point source , the first cathode for 1 minute, then anodized 3 minutes . The current density used 10A/dm2, stainless steel electrodes . Electrochemical reaction follows the sun grade degreasing degreasing : 4OH - 2e = O2 + H2O cathodic degreasing : 2H + +2 e = H2 using extremely tired after the first female joint oil law , the oil has to go fast, no hydrogen brittle advantages. 10. Rinse the workpiece after electrochemical degreasing book into sexual activity with thin red wash , prepare hast Yang processing. 11 anodized anodized liquid formulations shown in Table 4 , the installed base hung , to be inserted in the liquid -plated parts . A negative electrode lead plate , the positive electrode substrate. A current density of 25A/dm2, energization time of 3 minutes. Anodized to avoid the phenomenon of hydrogen embrittlement , especially for the final steps into the groove before . 12 After rinsing tank into the anode substrate processed quickly flushed into the plating bath preparation and plating. This completes the entire plating pretreatment diamond plating .