CURABLE FILM-FORMING COMPOSITIONS CONTAINING LITHIUM SILICATES AS CORROSION INHIBITORS AND MULTILAYER COATED METAL SUBSTRATES

摘要

A curable film-forming composition is provided, comprising: (1) a curable, organic film-forming binder component; and (2) a corrosion inhibiting component comprising a lithium silicate, present in the curable film-forming composition in an amount of 0.1 to 4.5 percent lithium by weight. Also provided are coated metal substrates, including multilayer coated metal substrates, comprising the above composition. Also provided is a multilayer coated metal substrate comprising: (a) a metal substrate; (b) a first curable film-forming composition applied to said metal substrate; and (c) a second curable film-forming composition applied on top of at least a portion of the first curable film-forming composition. The first and second curable film-forming compositions independently comprise: (1) a curable, organic film-forming binder component; and (2) a corrosion inhibiting component comprising lithium silicate, magnesium oxide and/or an azole.