GB/T 18719-2002 "Thermal spray terminology and classification", which clarifies the definition and classification criteria of professional terms in the field of thermal spray. The standard system combs the related terms of thermal spray materials, equipment, processes, coatings, etc., and standardizes the classification system of thermal spray methods, covering flame spraying, arc lame plating and other technical categories. It provides a unified language and classification basis for technical exchange, standard formulation and production practice in the thermal spray industry, and promotes the standardized development of the industry.