An aqueous coating composition comprising: - an aqueous latex of a copolymer consisting essentially of recurring units derived (i) from vinylidene chloride, (ii) from vinyl chloride, (iii) from one or more than one alkyl (meth)acrylate having from 1 to 12 carbon atoms in the alkyl group [monomer] and (iv) from one or more than one aliphatic alpha-beta unsaturated carboxylic acids [monomer], the proportion of recurring units derived from monomer being of at least 1.0 wt %, with respect to the total weight of the copolymer [copolymer], wherein: the said copolymer is stable against dehydrochlorination, in a manner such that the total chloride content of the solid residue of the aqueous latex, after thermal treatment at 120°C for 2 hours, is of less than 1000 ppm, with respect to the total weight of the copolymer, whereby the stability against dehydrochlorination is measured in accordance with the specific method detailed in the description; the said copolymer does not to undergo any significant crystallization upon heating, in a manner such that the ratio of (j) its crystallinity index, determined using infra-red spectroscopy by obtaining an attenuated total reflectance infra-red spectrum of the coated film, after a thermal treatment involving heating at 60°C for 48 hours to (jj) its crystallinity index before such thermal treatment (CI after thermal treatment /CI before thermal treatment) is less than 1.15, whereby the resistance against crystallization upon heating is measured in accordance with the specific method detailed in the description; and - at least one anti-corrosion pigment comprising an aluminium salt of a (poly)phosphoric acid modified with an alkaline earth metal oxide [pigment]; - at least one non-ionic surfactant [surfactant]; and - at least one inorganic filler [filler] different from pigment, in an amount such that the overall pigment volume concentration, comprehensive of pigment and filler, is comprised from 20 to 40 % vol., when determined with respect to the dried coating composition. - an aqueous latex of a copolymer consisting essentially of recurring units derived (i) from vinylidene chloride, (ii) from vinyl chloride, (iii) from one or more than one alkyl (meth)acrylate having from 1 to 12 carbon atoms in the alkyl group [monomer] and (iv) from one or more than one aliphatic alpha-beta unsaturated carboxylic acids [monomer], the proportion of recurring units derived from monomer being of at least 1.0 wt %, with respect to the total weight of the copolymer [copolymer], wherein: the said copolymer is stable against dehydrochlorination, in a manner such that the total chloride content of the solid residue of the aqueous latex, after thermal treatment at 120°C for 2 hours, is of less than 1000 ppm, with respect to the total weight of the copolymer, whereby the stability against dehydrochlorination is measured in accordance with the specific method detailed in the description; the said copolymer does not to undergo any significant crystallization upon heating, in a manner such that the ratio of (j) its crystallinity index, determined using infra-red spectroscopy by obtaining an attenuated total reflectance infra-red spectrum of the coated film, after a thermal treatment involving heating at 60°C for 48 hours to (jj) its crystallinity index before such thermal treatment (CI after thermal treatment /CI before thermal treatment) is less than 1.15, whereby the resistance against crystallization upon heating is measured in accordance with the specific method detailed in the description; and the said copolymer is stable against dehydrochlorination, in a manner such that the total chloride content of the solid residue of the aqueous latex, after thermal treatment at 120°C for 2 hours, is of less than 1000 ppm, with respect to the total weight of the copolymer, whereby the stability against dehydrochlorination is measured in accordance with the specific method detailed in the description; the said copolymer does not to undergo any significant crystallization upon heating, in a manner such that the ratio of (j) its crystallinity index, determined using infra-red spectroscopy by obtaining an attenuated total reflectance infra-red spectrum of the coated film, after a thermal treatment involving heating at 60°C for 48 hours to (jj) its crystallinity index before such thermal treatment (CI after thermal treatment /CI before thermal treatment) is less than 1.15, whereby the resistance against crystallization upon heating is measured in accordance with the specific method detailed in the description; and - at least one anti-corrosion pigment comprising an aluminium salt of a (poly)phosphoric acid modified with an alkaline earth metal oxide [pigment]; - at least one non-ionic surfactant [surfactant]; and - at least one inorganic filler [filler] different from pigment, in an amount such that the overall pigment volume concentration, comprehensive of pigment and filler, is comprised from 20 to 40 % vol., when determined with respect to the dried coating composition.