The Influence of Aluminum Tripolyphosphate on the Protective Behavior of an Acrylic Water-Based Paint Applied to Rusty Steels

Abstract EN

The protective performance, in conditions of total immersion, of an acrylic water-based paint applied to rusty steel, has been studied using electrochemical techniques.

There was no rust, blister, crack, or flake that occurred on coating after 500 h immersion.

The data obtained have enabled the protective mechanism to be proposed.

The specific pigments utilized in the formulation of the paint studied can release phosphates to form a protective layer on metal substrate, which can impede the access of aggressive species to substrate surface.

The coatings performed electrochemical activity in the beginning of immersion; then the layer formed and resistance of coating increased.