West Riding Blog

Differentiation through Cost Reduction & and Enhanced Durability Performance of Coatings

Differentiation through Cost Reduction & and Enhanced Durability Performance of Coatings

Dr Siva Bohm, Mr Phil Checkley & Dr Mallika Bohm


TATA Steel provides steel plate for the ship industry, coated with a pre-fabrication primer based on zinc silicate. The primer should provide corrosion protection during the fabrication should be over-coatable and does not interfere with welding and cutting processes. As Zinc price rocketing sky high, replacing 5-10% of zinc without reducing its effectiveness as a pre-fabrication primer was an attractive idea. An ideal material/zinc particle size to replace zinc should have enhanced connectivity between the zinc particles with the ability to charge transfer, and the environmentally friendly clay was there at low cost. Development work (Patented: EP 1479736 A1) showed very promising results; addition of ion-exchanged clay has significantly improved durability (by factor two), weldability and cutting speed.

Tata Steel Building Envelope has the capacity to produce up to 1.3MT of percolated steel each year which is used in many applications, from composite panels for construction applications through to domestic appliances and lighting fittings and automotive sector. The paints used to make this product contain a large percentage of volatile organic solvents (VOCs). Curing these paints requires a large amount of energy and there is a growing pressure to decrease amount of VOC due to environmental impact.  To be the market leader in the coil coating, TATA Steel Europe – Building Envelope needs to utilise advanced technology for meeting customer satisfaction as well as comply with environmental legislations and energy savings. TATA RD&T team addressed the alternative curing technology and nanoparticles technology on coil coating in TATA Steel manufacturing line.

Dr Siva Böhm received his first degree in Berlin (TFH) as Dipl. Eng (Chemical Engineering), MSc in Applied Chemistry at Hahn Meitner Institute (MPI) in Berlin, Germany, and obtained his  PhD (University of Bath, UK – Chemistry/Electrochemistry), Siva then worked as Research officer and Research fellow as at different academic institutions; University of Wales Swansea, TU-Delft/NIMR/M2i in the Netherlands, University of Birmingham on various aspects of metal localised corrosion, coating formulations, corrosion inhibitors, corrosion in fuel elements/chemistry in storage ponds,  and atmospheric corrosion of metals.


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