A new painting process for vessel radiators of transformer: wet-on-wet

The painting process of corrugated wall radiators of a distribution transformer is performed by a flow-down painting technique in the industrial field. This study has been prepared in accordance with ISO 12944-5. Correspondingly, this work is motivated by Epoxy 2-pack paints (4.3.4.2) to obtain minimum requirements for C3 atmospheric corrosivity categories (5.1.1). This standard requires from the vertical surface of the vessel of the transformer to be painted with epoxy paints that contain anti-corrosive pigments with a minimum of 100 mu m dry film thickness. In the present study, a new production methodology called wet-on-wet (WOW) painting is developed which has never been used in industry. In addition, a modified response surface methodology (RSM) is proposed for designing, modeling, and optimizing the proposed process under unsteady environmental effects. The results indicate that the WOW painting can be applied to real industrial systems successfully by the aid of the proposed new RSM algorithm and provide remarkable time and cost savings.