Steel surface protection with coatings based on polyurethane and silicon organic compounds

Coatings of oligomethylsiloxane resin (OMES) and hydrolyzed heptadecafluorotetrahydrodecyltrimethoxysi-lane (HFS) oligomers were obtained by the spin-coating method on polyurethane (PU) - modified steel substrates. Their wettability and tribological properties were studied. It was found that the modification of the PU layer with silicon organic compounds increases its hydrophobicity and wear resistance. The water contact angles are 63.1° for a PU coating, 81.2° for PU/OMES and 115.8° for PU/HFS.