About Us

Solchrome Private Limited, an ISO-9001:2000 certified Company, is engaged in the manufacture of Black Continuously Plated Solchrome Solar Selective Coating Sheets, Black Continuously Plated Solchrome Solar Selectively Coated TIG / Ultrasonic Welded Fins and Tubes, Solchrome Flat Plate Solar Collectors and Solar Water Heating Systems (SWHS).

Black Continuously Plated Solchrome Solar Selective Coating Sheets manufactured by us at our works in Parwanoo, Himachal Pradesh (India) have a very high absorptivity of 0.96 + 0.02 and low emissivity of 0.12 + 0.02. The process of manufacturing the same starts with electrochemically cleaning the copper sheets after which they are electroplated with nickel. Subsequently, black chrome is electrochemically deposited over the nickel coating in a continuous process.

Our manufacturing process is based on years of research and machine development. Our production line is designed for fully automatic operation. Each roll of copper goes through precleaning and rinsing stages before nickel is applied. Subsequent to the nickel application the copper is rinsed again before the black chrome solar selective coating is applied and thereafter the surface is subjected to a series of chemical rinses after which it undergoes an extensive drying period. The quality department then performs a series of tests to ensure that our customers receive an excellent product. During production optical readings are taken every 30 m to check Absorptivity (α) and Emissivity (ε) levels. These readings must fall within our rigid specifications of 0.96 ± 0.02 (α ) and 0.12 ± 0.02 (ε) .

The continuous manufacturing process is the key to the consistently high optical readings achieved. The coating thickness is controlled by line speed, tank temperature and current density. This process ensures production of a much higher quality solar selective surface than traditional batch electroplating. The nickel undercoat ensures better moisture resistance, better adhesion of coatings on the base metal, better control of emissivity and the same also ensures a long life for the coatings.