AWS C2.23M-C2.23:2018 pdf download.Specification for the Application of Thermal Spray Coatings (Metallizing) of Aluminum
1.2 Scope. Included are requirements for surface preparation, coating application, repair of coating defects,measurement of coating thickness, adhesion testing of the applied coating, and application of sealers and topcoats over the thermally sprayed metal coating. Not included in this standard are requirements for design and fabrication, thermal spray equipment qualification, coating selection, and operator and inspector certification. For successful thermal spray application, the steel structure and components should be designed and fabricated in accordance with NACE SP0178. I Additional consideration should be given to weldments and components, or structures with thermal cut edges, whose hardness may preclude adequate profile depth.
1.3 Safety. The basic precautions for thermal spraying are essentially the same as for welding and cutting. Information on safety can be found in ANSI(1) Z49. 1, Safety in Welding, Cutting, and Allied Processes;2 and NFPA(2) 58, Standard for the Storage and Handling of Liquefied Petroleum Gases.3 Read and follow safety precautions in the manufacturer's equipment technical instructions and manuals and the feedstock safety data sheet (SDS). See U.S. Code of Federal Regulations (CFR)(3) Title 29 CFR 1910.94(c)(6)(i), “Ventilation," for Occupational Safety & Health Administration (OSHA)4) ventilation requirements for spray booths.
1.3.1 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety issues associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations before use.
1.3.2 Potential thermal spraying hazards include exposure to vapors, dust, fumes, gases, noise (from the spray gun),and arc ultraviolet (UV) radiation. Additionally, improperly used thermal spray equipment can create potential fire and explosion hazards from oxygen, fuel, and compressed gases and a potential electrical shock hazard from the eletrical and electronic equipment and charged wire spools. To minimize hazards, proper safety precautions shall be followed. Operators shall comply with the procedures in the safety references, the manufacturer's technical manuals, and the safety data sheets (SDS).
1.3.3 All TSC equipment operators shall be qualified to a prequalified procedure before production application of the coating. Procedure and TSC equipment operator qualifications shall be retained by the contractor and made available to the end user upon request.
bend test. The bend test is a qualitative test of the ductility and tensile adhesion of the TSC. It serves as a macro-system test of surface preparation, equipment setup, spray parameters, and application procedures (see Nonmandatory Annex A).AWS C2.23M-C2.23 pdf download.