Natural honey and black radish juice as tin corrosion inhibitors

The influence of natural honey (chestnut and acacia) and natural honey with black radish juice, on corrosion of tin in aqueous and sodium chloride solutions was studied using weight loss and polarization techniques. The inhibition efficiency of acacia honey was lower than that of chestnut honey, while the addition of black radish juice increased the inhibition efficiency of both honey varieties. The process of inhibition was attributed to the formation of multilayer adsorbed film on the tin surface. The adsorption of natural honey and honey with black radish on tin was found to follow the Langmuir adsorption isotherm. (c) 2008 Elsevier Ltd. All rights reserved.