The invention provides
coating and repairing methods of a medium-low temperature multi-frequency-band compatible coat of an engine jet
nozzle part and belongs to the field of
coating of coats for aero-engines. The
coating method comprises the steps that ultrasonic cleaning and
drying are conducted on the to-be-treated engine jet
nozzle part,
organic solvent degreasing is conducted, protection of anon-coat area is conducted, and
sand blasting is conducted;
spray coating of a primer is conducted, indoor temperature cooling is conducted,
spray coating of a middle layer is conducted, the middle layer is cured, protection of the non-coat area is removed, the surface of the middle layer is cleared, secondary protection of the non-coat area is conducted,
spray coating of a finishing coat is conducted, the finishing coat is cured, and the product is obtained. The coating and repairing methods of the medium-low temperature multi-frequency-band compatible coat of the engine jet
nozzle part meets the demand of an
airplane for a medium-low temperature multi-frequency-band compatible coat; for the use and structure features of the engine jet nozzle part, the
pretreatment method improves the surface quality of the engine jet nozzle part, and the
binding force of the coat is improved beneficially; heating curing is applied to the coat, so that the production period is shortened; for variousdamaged states, probably appearing in the transportation process, the
assembly process and the use process, of the coating, corresponding repairing methods are adopted, and therefore the coating and repairing methods have better pertinence.