ANTICORROSIVE AND FLAME RESISTANT COATINGS

GIUDICE, CARLOS A.; PEREYRA, ANDREA M.; VIDELA, HÉCTOR A.

Pernambuco, Brasil

Congreso; INTERCORR 2008 ABRACO; 2008

Asociación Brasileña de Corrosión

Flame retardant coatings with anticorrosive properties were formulated to protect metallic structures of buildings. They were based on a chlorinated alkyd resin and on several pigments (rutile titanium dioxide for improving hiding power, micaceous iron oxide for controlling film permeability, zinc hydroxiphosphite for corrosion prevention and finally antimony trioxide,zinc borate or alumina trihydrate alone or else a mixture among them for acting as fireproofing. SAE 1010 panels (sandblasted to ASa 2 ½, SIS 05 59 00/1967; 30 maximun roughness), were employed. Coatings attained 100-110 dry film thickness. Inhibiting behavior was assessed in salt spray (fog) and in 100 % relative humidity cabinets; the fire retardant capacity was established by determining the limiting oxygen index (LOI) and flame spread value (Two Foot Tunnel). Key words: coatings, rusting, blistering, limiting oxygen index, flame spread value.