Oxidation Studies On 209 T1 and 213 T11 Alloys With Inhibition Corrosion By Using MgO

Abstract

Hot ash corrosion of high temperature combustion equipment from burning petroleum fuels containing Na, S and V, and recommendations for preventing or controlling fuel oil may result in severe damage to metal surfaces.

  The use of MgO as a fuel additive to combact vanndic corrosion is widely accepted practice for boilers operating on residual or low grade fuels. MgO has the ability to form high melting stable vanadate but the presence of Na₂SO₄ can react with the magnesium and reduce its effectiveness. This paper aims to

quantify  the effectiveness of MgO as an inhibitor in the presence of increasing amounts  of Na₂SO₄. Amethod of determining permissible levels of Na₂SO₄ to satisfy predict remind corrosion rates or additive efficiencies is described. Examples of the loss of additive efficiency with weight of Na₂SO₄ at temperature of 750 and 850°C are given for both 209 T1 and 213 T11 alloys.