The invention relates to a
nickel-
ruthenium composite coating plating method for a
molybdenum alloy substrate, which is applied to the field of
processing and manufacturing of
metal-based
molybdenum alloy substrates and comprises the following steps: carrying out surface pretreatment on a
molybdenum sheet
raw material to obtain a net molybdenum sheet; putting the pure molybdenum sheet into
vacuum coating equipment, and starting the
vacuum coating equipment to vacuumize to form a vacuum
system; and
vacuum coating equipment is started for heating, a high-temperature
system is formed, the surface of the net molybdenum sheet is coated with a
physical vapor deposition method, and the molybdenum sheet with
nickel plated on the two faces and
ruthenium plated on the single face is obtained. The method has the technical effects that a good
coating film is formed on the surface of the molybdenum sheet through a vacuum
coating method, the method is green and
environmentally friendly, harmful substances are reduced, the
adhesive force between the
coating layer and the molybdenum sheet is high, the film layer is high in purity and good in quality, and the
production quality of the molybdenum
alloy substrate is improved.
Grease, oxides, residual solvents, impurities and the like on the surface of the molybdenum sheet are cleaned through the surface pretreatment step, the surface quality and
binding force of the molybdenum sheet are improved, and the connection firmness of the
nickel-
ruthenium composite coating on the surface of the molybdenum sheet is improved.