Original Articles: 2011 Vol: 3 Issue: 6
Electrodeposition of Nanocrystalline Zinc on Steel Substrate from Acid Sulphate Bath and its Corrosion Study
Nanocrystalline zinc was electrodeposited on steel substrates from acid sulphate bath. The condensation product formed between Glycyl-glycine (GGL) and Veratraldehyde (VTL) was used as brightener. The effect of bath constituents, pH, temperature and current density were optimized through Hull cell studies. Potentiodynamic polarization, cathodic current efficiency, throwing power studies were carried out. Salt spray test and electrochemical measurements showed that nanocrystalline zinc coatings have better corrosion resistance. The inclusion of addition agent in the deposit was confirmed by FT-IR studies. The surface morphology of the zinc deposit was investigated through SEM studies. The crystal structure was studied by X-ray diffraction and TEM analysis.