Premium
Long‐term atmospheric cathodic protection of 55 % Al‐Zn coating on steel and its comparison with galvanized steel
Author(s) -
Palma E.,
Morcillo M.,
Fernéndez B.
Publication year - 1997
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19970481107
Subject(s) - galvanization , metallurgy , coating , cathodic protection , galvanic anode , materials science , galvanic cell , corrosion , anode , layer (electronics) , composite material , electrode , chemistry
This paper presents the results obtained in a 5 year study of the galvanic protection afforded to the base steel by a 55 % Al‐Zn Made in Spain by CSI Planos under the trademark Algafort which has been licensed by BIEC International, Inc. This product is commercially available in U.S.A. under the trademark Galvalume. coating and its comparison with a galvanized coatin., in different types of atmospheres. While both coatings hardly supply cathodic protection (CP) in rural and urban atmospheres, in marine and industrial type atmospheres they present excellent galvanic performance, which is conditioned only by the duration of the anodic material on the steel substrate. This duration is considerably greater in the 55% Al‐Zn coating, due to its lower corrosion rate in the atmosphere.