STUDY OF THE EEFECT OF HEAT TREATMENT ON HARD CHROMIUM PLATING ELECTRODEPOSITED FROM HEXAVALENT CHROMIUM SOLUTION BATH ON LOW CARBON STEEL

• Main Author: Setyo Nugroho, Adhi
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/57458
• Institution: Institut Teknologi Bandung

This research conducts hard chromium plating process using Sargent conventional and ABCD (Amorphous Bright Chromium Deposition) methods. Hard chromium plating using Sargent conventional method resulting plating hardness value of 1073 ? 81,22 VHN. While the addition of formic acid of 40 mL/L to the conventional solution resulting hard chromium with a plating hardness value of 1064 ? 85,21 VHN. After the heat treatment process at the temperatures of 300 °C and 500 °C, Cr plating experiences a significant decrease in its plating hardness value from 1073 ? 81,22 VHN to 820 ? 46,32 VHN and 792 ? 48,80 VHN respectively. In contrast, Cr-C plating experiences a significant increase in its plating hardness value from 1064 ? 85,21 VHN to 1207 ? 94,93 VHN and 1315 ? 71,38 VHN, respectively. From X-Ray Diffraction characterization, the significant increment in plating hardness is caused by the chromium carbide phase, Cr7C3.