Keywords
Citation
(1999), "Hot dip galvanizing", Anti-Corrosion Methods and Materials, Vol. 46 No. 2. https://doi.org/10.1108/acmm.1999.12846bab.003
Publisher
:Emerald Group Publishing Limited
Copyright © 1999, MCB UP Limited
Hot dip galvanizing
Hot dip galvanizing
Keywords Corrosion, Galvanising, Hot-dip, Steel
Hot dip galvanizing, one of the oldest and most effective methods of protecting steel from corrosion, is also the least expensive, according to the results of a recent survey released by the American Galvanizers Association (AGA).
An independent accounting firm surveyed more than 200 galvanizers in the USA and Mexico and determined the average pricing for a variety of structural sizes. The data were then compared to the painting cost data published in NACE CORROSION/96 paper no. 477, "Updated Protective Coating Costs, Products, and Service Life."
Four average paint systems were compared: a three-coat acrylic urethane system with epoxy primer, a three-coat latex system, a three-coat acrylic water-borne system, and a one-coat inorganic zinc-rich paint. The study revealed that galvanising is less expensive on an initial cost basis than three of the coatings. The only coating to cost slightly less was the inorganic zinc-rich paint system, which has a lower life expectancy than hot dip galvanizing.
The expected lifetime of each coating was also considered in the cost analysis, including projected maintenance costs, opportunity costs, and inflation. Hot dip galvanizing topped the list in both performance and economy.
A complete analysis of the costing survey is included in the publication, Hot Dip Galvanizing Costs Less and Lasts Longer. It is available from the AGA, 12200 E. Iliff Avenue, Aurora, Colorado 80014 or Tel: 800/468-7732.