METHOD OF THERMODIFFUSION GALVANISING OF PRODUCTS FROM FERROMAGNETIC MATERIALS Russian patent published in 2014 - IPC C23C10/36 

FIELD: chemistry.

SUBSTANCE: retort is placed inside inducers by means of additional mechanisms of a longitudinal movement, heating of the retort surface to a specified value is performed in two stages, at the first stage it is heated to a temperature, equal to 85-90% of the specified value, which is measured in a zone of inducers by means of thermocouples, additionally installed in the said zones. When the value of the said range is achieved in the zone of inducers, electrical power supply of the inducers is switched off and the retort is moved towards the output from the heating installation by a value, equal to the distance between the inducers, after that, electrical power supply of the inducers and additional mechanism of the retort rotation is switched on at the moment when the mechanisms touch the retort surface, and heating of the retort with eddy currents is continued until achievement of the specified value of temperature in displaced zones of the retort, which constitutes 250-550°C depending on zinc content, constituting 10-50 wt % in the zinc mixture, and weight of loaded into the retort products, time of the retort exposure in a heating installation is determined depending on the zinc mixture composition and required thickness of the coating, constituting from 30 to 300 mcm. In the process of galvanising a continuous relief of overpressure in the retort is carried out. After that, the retort is removed from the inducers, subjected to cooling and the galvanised products are discharged.

EFFECT: reduction of duration of the technological cycle of application of an anticorrosion zinc coating, reduction of energy consumption, reduction of zinc powder consumption, provision of high quality of the zinc coating with an increase of its thickness to 300 mcm, an increase of the device operation reliability.

4 dwg, 1 tbl