The surface condition effect on adhesion and corrosion resistance of carbon steel/chlorinated rubber/artificial sea water systems.

P.R. SERÉ; A.R. ARMAS; C.I. ELSNER; A.R. DI SARLI

CORROSION SCIENCE

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 1996 vol. 38 p. 853 - 866

0010-938X

The influence of both substrate structure and roughness on the adhesion strength and corrosion resistance of carbon steel/chlorinated rubber varnish/artificial sea water system was analysed. Experimental results obtained from electrochemical and normalized tests showed that the metal/coating adhesion increases before immersion as does the steel roughness. This is due to the enlargement of the number of active sites for metal/coating bonding: not only the specific characteristics of such system but also those arising from the environment must be taken into account. A high dry adhesion grade does not always lead to a good practical performance, although the substrate structure and roughness changes did not produce significant changes in adhesion strength and corrosion resistance. The martensitic structure showed the worst performance in all the tests.