Аннотация:An indium tin oxide (ITO) is used as anti-charging coating of spacecraft materials. An electric conductivity of the coating was studied under oxygen plasma beam impact. The dramatic growth of resistivity as far as some order of magnitude was measured when effective oxygen fluence increasing. Admittedly the effect results in fall of passive protection of spacecrafts charging during long missions. Ground-based tests of the coating are suggested to predict conductivity degradation on flight.