Glossary of terms used in galvanizing of steel...

Glossary of terms used in galvanizing of steel Galvanizing is carried out to protect steel against corrosion. The process is carried out in several steps as shown in Fig 1. Fig 1 Steps in the process of galvanizing  The common terms used in galvanizing of steel are given below. Abrasion resistance – It is the ability of the galvanized coating to resist damage caused by contact with hard, rough, or coarse media or objects. Abrasive blasting – It is the process of using a forceful stream of particles, available in varying hardness, to remove residue and contaminants from steel surfaces to prepare for galvanizing. Adherence – It is the act, action, or quality of zinc bonding to steel, measured in grams/Sq mm. Aggressive environment – It is an environment that is particularly corrosive. Alloy layers – It is the interior layers of the galvanized coating which comprised of iron/zinc intermetallics formed when molten zinc reacts with iron in the steel. Aluminum – It is the element found in the galvanizing bath (added to molten zinc through a product commonly called “brightener bar”) that gives the hot-dip galvanized coating a shiny appearance. Amphoteric – It is having the characteristics of an acid and a base and capable of reacting chemically either as an acid or a base. Anion – It is a negatively charged ion, especially the ion that migrates to an anode in electrolysis. Anode – It is the electrode of an electrolytic cell at which corrosion (oxidation) occurs, positive current flows from the anode through the electrolyte to the cathode. With respect to hot dip galvanizing, anode refers to zinc, which corrodes sacrificially to protect steel. Anodic – exhibiting of the properties of an anode. Zinc is anodic to steel. Application – It...