AWS C2.19-C2.19M:2013 pdf download.Specification for the Application of Thermal Spray Coatings to Machine Elements for OEM and Repair
1.1 Scope. This specifcation covers thermal spray processes for original equipment manufacturers (OEMs) and the repair of machinery components. The scope includes (1) recommended applications, (2) management and engineering requirements, (3) equipment and facility requirements, (4) feedstock materials, and (5) application processes for thermal spray coatings.
The thermal spray processes covered by this standard are combustion and high velocity oxygen fuel powder, electric arc,and plasma processes that use either powder or wire as feedstock.
Development of this standard was initiated at the request of the U.S. Navy to replace MIL / STD- 1687A (SH), Thermal Spray Processes for Naval Ship Machinery Applications. It contains Annex B that the Navy may still use as their guide for surface ship applications. Annex B also lists Navy applications that are permitted and those that are prohibited, including the certification, approval requirements and protocols for handling U.S. Navy components.
Others may use this standard and annexes as a guide to establishing contract document requirements between equipment owners (purchaser) and thermal spray coating contractors where they may choose to invoke all or only a portion of this specification's requirements as fits the needs of their work.
1.2 Units of Measure. This standard makes use of both U.S. Customary Units and the International System of Units (SD).The latter are shown within brackets ([ ]) or in appropriate columns in tables and figures. The measurements may not be exact equivalents; therefore, each system must be used independently.
1.3 Safety. Safety and health issues and concerns are beyond the scope of this standard; some safety and health information such as Personal Protective Equipment is provided in clause 6, but such issues are not fully addressed herein.Annex A provides more comprehensive safety and health information specific to thermal spray.
4. General Applications
Thermal spray coatings (TSCs) are applied to original equipment manufactured (OEM) components to provide surface-engineered coatings for improved wear, abrasion, and corrosion resistance. For machinery component repair, TSCs are also used to restore dimensions, buildup worn or mis-machined parts and to improve wear, abrasion, and corrosion resis-tance. TSCs are not intended to fill gouges or similar localized damage without building up the entire area. TSCs do not restore mechanical properties such as tensile strength or resistance to fatigue stresses. Additionally, high velocity oxygen fuel powder coatings are used to replace hard chrome plating and to provide improved wear or abrasion resistance.Thermal spray coatings can be used to apply deposits that enhance surface properties in other ways for applications not addressed by this document, i.e. thermal resistance, electrical conductivity and clearance control.AWS C2.19-C2.19M pdf download.