The invention relates to the field of aluminum
alloy surface treatment, in particular relates to an environmentally-friendly
corrosion-resistant
chromium-free
chemical conversion liquid and an application thereof in an environmentally-friendly
corrosion-resistant
chromium-free
chemical conversion film with aluminum
alloy coating adhesion for ships, and solves the problems of incapability of meeting the requirements on
corrosion resistance and
coating adhesion in the current environmentally-friendly
chemical conversion treating process. The prepared chemical conversion film has excellent corrosion resistance and
coating adhesion, is convenient in construction and can be used for substituting for a traditional
chromium-containing chemical conversion and
phosphate treatment process. The environmentally-friendly corrosion-resistant chromium-free chemical conversion liquid mainly comprises the components of
silane, corrosion inhibition components and a
solvent. The chromium-free chemical conversion film construction
modes comprise dipping, roller painting and spraying, and the curing
modes comprise natural curing and heating curing. The environmentally-friendly corrosion-resistant chromium-free chemical conversion film in the invention has excellent corrosion resistance and
coating adhesion, can be used for substituting for a traditional chromium-containing chemical conversion and
phosphate treatment process, and is applicable to aluminum alloys for ships such as 5xxx and 6xxx series aluminum alloys.