Special Silicone Treatments of Anodized Aluminium Surfaces

In a new process for reducing adhesion of ice to aluminium alloy used in refrigerators, an application of a special organosiloxane to the anodized surface is followed by heat treatment. Three organohydrosiloxanes and three variations of heat treatment were examined in respect of their effect on resistance to abrasion and corrosion. The treatments were more effective with 2S grade aluminium than with 3S. The abrasion resistance was increased about tenfold and it is considered that this improvement results from chemical bonding between the organohydrosiloxanes and anodized layers.