Patent ID: 6887320

Claim:
A process for applying a chromate-free, corrosion resistant coating to a product formed from a magnesium based material, comprising the steps of: degreasing the product formed from the magnesium based material in a degreasing solution; cleaning the product formed from the magnesium based material in a highly alkaline cleaning solution; deoxidizing the product formed from the magnesium based material in a deoxidizing solution; and immersing the product formed from the magnesium based material in a solution containing phosphate and fluoride ions where a pH level of the solution is controlled in an approximate range of 5 to 7, the solution being provided with 1.0 g/l to 5.0 g/l of an active corrosion inhibitor selected from the group consisting of sodium tungstate, sodium vanadate, and mixtures thereof and being maintained at a temperature of approximately 120 to 200 degrees Fahrenheit while immersing the product formed from the magnesium based material for a period of approximately 15 minutes to 90 minutes.