TY - JOUR
T1 - Steel cathodic protection afforded by zinc, aluminium and zinc/aluminium alloy coatings in the atmosphere
AU - Panossian, Z.
AU - Mariaca, L.
AU - Morcillo, M.
AU - Flores, S.
AU - Rocha, J.
AU - Peña, J. J.
AU - Herrera, F.
AU - Corvo, F.
AU - Sanchez, M.
AU - Rincon, O. T.
AU - Pridybailo, G.
AU - Simancas, J.
PY - 2005/1/21
Y1 - 2005/1/21
N2 - Zinc has traditionally been the metallic material most widely used to protect steel against atmospheric corrosion due to its ability to afford cathodic protection to steel in all types of natural atmospheres. In recent decades, aluminium and zinc/aluminium alloy coatings have been used instead of zinc in certain atmospheric applications. Although these coatings present some advantages over zinc, they are not able to cathodically protect steel substrates in all types of natural atmospheres. The present paper assesses the cathodic protection afforded by Al (flame spraying), Al/13 Si (hot dipping), 55Al/Zn (hot dipping), Zn/15Al (flame spraying), Zn/5Al (hot dipping), Zn (hot dipping), Zn (discontinuous hot dipping) and Zn (electroplating). Aluminium and aluminium-rich alloy coatings (55%Al/Zn) provide cathodic protection to the steel substrate only in atmospheres that are highly contaminated with chloride ions (>100 mg Cl- m-2 day-1) where these coatings become active.
AB - Zinc has traditionally been the metallic material most widely used to protect steel against atmospheric corrosion due to its ability to afford cathodic protection to steel in all types of natural atmospheres. In recent decades, aluminium and zinc/aluminium alloy coatings have been used instead of zinc in certain atmospheric applications. Although these coatings present some advantages over zinc, they are not able to cathodically protect steel substrates in all types of natural atmospheres. The present paper assesses the cathodic protection afforded by Al (flame spraying), Al/13 Si (hot dipping), 55Al/Zn (hot dipping), Zn/15Al (flame spraying), Zn/5Al (hot dipping), Zn (hot dipping), Zn (discontinuous hot dipping) and Zn (electroplating). Aluminium and aluminium-rich alloy coatings (55%Al/Zn) provide cathodic protection to the steel substrate only in atmospheres that are highly contaminated with chloride ions (>100 mg Cl- m-2 day-1) where these coatings become active.
KW - Aluminium coatings
KW - Atmospheric corrosion
KW - Cathodic protection
KW - Coated steel
KW - Zinc coatings
KW - Zinc/aluminium alloy coatings
UR - http://www.scopus.com/inward/record.url?scp=10144231479&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2004.04.023
DO - 10.1016/j.surfcoat.2004.04.023
M3 - Article
AN - SCOPUS:10144231479
SN - 0257-8972
VL - 190
SP - 244
EP - 248
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
IS - 2-3
ER -