FIELD: chemistry.
SUBSTANCE: invention discloses a layer or coating having a matrix consisting of a binding system and ceramic particles, as well as boron nitride in form of particles which are included in the matrix, where the boron nitride particles are particles of hexagonal boron nitride, and the binding system includes an organosilicon and/or inorganic binder selected from a group comprising particles of oxides of aluminium, titanium, zirconium or boehmite. The invention also discloses a composition for making said layer or coating; a method of making said layer or coating; using the composition which contains boron nitride as material for coating surfaces which are in contact with salty solutions; and water treatment apparatus having components which are in contact with salty water.
EFFECT: disclosed layer or coating prevents crystal settling even at room temperature, is suitable for substrates with surfaces made from metal, glass, ceramics, enamel or smooth plastic, where the layer or coating has longer service life.
19 cl, 7 ex
