Commonwealth Scientific and Industrial Research Organisation

Sally Ann Nugent

Anthony Ewart Hughes

Lance Wilson

Russell James Taylor

Mark Julian Henderson

Karen Joy Hammon Nelson

Bruce Roy William Hinton

Karen Joy Nelson

Bruce Roy Hinton

A metal surface which has been cleaned using an alkaline based solution is treated with an acidic solution which contains rear earth ions to remove any smut which may have been produced during the alkaline cleaning. A coating is formed on the cleaned surface using a different acidic solution containing rare earth cations which have multiple valence states. When the surface is reacted with coating solution, an increase in the pH at the metal surface indirectly results in precipitation of a rare earth metal such as cerium onto the surface. Alternatively, after the removal of the smut, the surface may be coated using a painting technique.

Metal treatment with acidic, rare earth ion containing cleaning solution

Conversion coating and process and solution for its formation

Growing community of inventors

Surrey Hills, Australia

Sally Ann Nugent