This layer considerably improves corrosion resistance of material, preserving at the same time mechanical strength. Created layer has slightly blue opalescence and it does not degrade at high temperatures. Parameters of chromating process determine resulting coating thickness of article. In this way specific selection of parameters: time, temperature and bath composition, allows to get properties exactly to customer  requirements. Chromating may be used in many aspects ? as improvement of corrosion resistance of aluminum, surface preparation prior to painting and gluing and obtaining decorative effects like change in gloss and color of processed surface.