ACCELERATED LOW-TEMPERATURE PHOSPHATING FROM SOLUTIONS OF RUST CONVERTERS

Аннотация

Along with phosphating solutions, rust converters are widely used to obtain anti-corrosion coatings,
the use of which does not require preliminary treatment of the metal surface, as is the case with traditional
phosphating solutions. However, methods for accelerating phosphating in solutions of rust converters have not found
proper application and remain little studied. The aim of this work was to use organic nitro compounds as accelerators
in solutions of rust converters for accelerated low-temperature phosphating of the iron samplessurface. Phosphomet
and Tsinkar solutions manufactured in industry were used as rust converters, and sodium nitrophenol and sodium msodium nitrobenzosulfonate (m-NBS) were used as accelerators.The corrosion resistance of the formed coatings
(ZCA), determined by the drop method of Akimov, is compared with the corrosion resistance of coatings deposited
from traditional phosphating solutions. The deposition of phosphate coatings was carried out at a temperature of
40°C, a deposition time of 10 minutes, a solution stirring speed of 500 rpm.A study of the effect of phosphate
accelerators on the change in the surface structure of deposited coatings, roughness, thickness, and adhesion is
carried out