GUIDELINES FOR APPLYING THERMAL SPRAY COATINGS TO PROTECT PULP MILL PROCESS EQUIPMENT AGAINST CORROSION

• This technical information paper contains guidelines and describes quality evaluation procedures for field application of metallic thermal spray coatings that are applied for corrosion protection in pulp mill process vessels such as batch digesters, continuous digesters, flash tanks, evaporators, and concentrators.
• These guidelines inform equipment owners and mill engineers of the properties a thermal sprayed coating should have for the coating to perform adequately in service.
• Thermal spray coatings are applied by spraying metallic or non-metallic materials in a molten or near-molten form onto the surface to be protected after the surface is properly prepared. The materials to be sprayed are in the form of a wire or powder.

It Provides information on:

• Safety precautions.
• Creating a coating project specification.
• Qualifying the spray process and operators.
• Surface preparation.
• Inspection and quality control.
• Stripping and reworking.

Who will benefit:

• Quality Manager.
• Engineers.
• Maintenance Manager.
• Safety Manager.
• Supervisor.