COVERING FOR TURBINE BLADES Russian patent published in 2009 - IPC C23C10/56 

FIELD: chemistry.

SUBSTANCE: invention relates to covering for turbine blades and, particularly, to simultaneous processing of external and internal surfaces of turbine blades. The following operations are carried out: putting on outer surface of aluminating composition, which includes aluminium, inhibitor, activator and thinner, by putting blade in aluminating composition, applying on internal surface of chromium-plating composition, heating of turbine blade or fan with formation of aluminium layer on external surface and chromium layer on internal surface. Aluminating composition contains 3-20 wt % of aluminium, 10-50 wt % of inhibitor, 0.1-2 wt % of activator and at least 20 wt % of thinner, ratio of aluminium and inhibitor weights constitutes from 1:2 to 1:5. Chromium-plating composition contains 15-65 wt % of chromium, 0.1-5 wt % of activator and at east 20 wt % of thinner.

EFFECT: obtained coverings are applied for protecting turbine blades and fans from sulfide corrosion.

7 cl, 1 dwg, 1 ex