ANTI-COKING COATINGS FOR REFRACTORY ALLOYS USED IN THE PETROLEUM FIELD

摘要

The invention concerns anti-coking coats for refractory alloys used in the oil industry. Said coats are obtained by a method comprising the following steps: 1) submitting the refractory alloy surface (5) to the action of an oxygen and/or nitrogen gas plasma at a low frequency; 2) depositing on the treated surface a coating based on silicon oxide, nitride or oxynitride by plasma enhanced chemical vapour deposition at low frequency, from an organosilicon compound and a gas selected among oxygen and nitrogen; the two steps being carried out consecutively and continuously in the same installation (1) without venting between the two steps.