31 декабря, 2015 
Pokraskin The inhibitive properties ofmolybdate-based anticorrosive pigments are attributed to the ability ofmolybdate ions to pass into solution, and to migrate to the metal surface resulting in the formation of a protective layer on the substrate, which insulates (passivates) the metal from attack and prevents corrosion [5.91].
The use of the pure molybdate-based pigments available on the market is limited due to their cost [5.53, 5.56]. To overcome this disadvantage, molybdate, and phosphate pigments are combined (see Section 5.2.5.2.) or molybdate compounds are applied to inorganic fillers like calcium carbonate and/or zinc oxide [5.56, 5.91].
Compared to the pure modified molybdates, those combinations are difficult to disperse [5.53]. Micronized versions of combined molybdate based pigments that are available today as easily dispersible grades are summarized in Table 5.10 [5.91].
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Tab. 5.10: Typical properties of molybdate-based pigments [5.91].
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5.2.9
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