सीएसआईआर- केंद्रीय विद्युतरसायन अनुसंधान संस्थान
(विद्युतरसायन के क्षेत्र में एक प्रमुख अनुसंधान एवं विकास संस्थान)
Industrial Metal Finishing Overview

In IMF Division there are five R&D activities, Electroforming, Electroless Plating, Deposition & electro polishing of metals & alloys from Low Temperature Molten Salt (LTMS) electrolyte, AC anodizing and electrochemical materials for solar thermal energy conversion.

Electroforming: IMF Division has expertise on electroforming of larger size materials like Cryogenic Rocket engine thrust chambers C1, C12, C20, steering engines, linear accelerators, waveguides, hologram, nickel crucible, molds and dies.

Electroless plating: IMF Division has done several projects, technical and consultancy services to various Indian industries. Some of them are: Electroless nickel on Beryllium rings and discs for space mirrors, on textile aluminum drums, on AlSiC metal matrix composites for LASER mirror, on marraging steel LCA components for ADA, on Plunger cam for oil pump, on alumina ceramic rods for electronic resistors, on mild steel caps for electronic resistors, on synthetic diamond particles of 200 micron for diamond tipped tools and development of electroless composites.

Electrochemical materials for solar thermal energy conversion: IMF Division has done some works on the development of selective black coatings, polishing of Al and SS for solar thermal applications. We had fabricated some gadgets using selective coatings and studied their performance.

Deposition & electro polishing of metals and alloys from LTMS electrolyte: LTMS / ionic liquids are promising one in electroplating and metal finishing. Using Imidazole as the base chemical for LTMS, studies have been carried out on Zinc plating, direct copper plating on mild steel and electropolishing of copper and stainless steel. It produces very finer grained zinc deposits than deposit produced from the bath containing organic additive or deposit produced using pulse current.

AC anodizing of Aluminium: AC anodizing is simple without much investment on rectifier as do with DC anodizing. We did some work on AC anodizing in a simple electrolyte with various metallic and organic additives and colouring of anodized Aluminium by electroless method.