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18 de sept. de 2002 · Field Touch-up and Repair How should contract documents address the problem of job-site mill-scale flaking? When SSPC-SP2 (hand tool cleaning) or SSPC-SP3 (power tool cleaning) surface preparation is specified and a short-exposure-life prime coat is subsequently applied, tight mill scale generally remains on the surface prior to shop ...
2.0 SCOPE. This procedure covers the minimum requirements on the surface preparation and application for the touch-up/ repair painting of damaged external surfaces of structural steel, galvanized surfaces and process piping.
painting / coating for the touch-up and repair of damaged external or inter nal surfaces of existing structures and facilities including structural steel works, process piping, pressure vessels, galvanized surfaces and equipment. PURPOSE This procedure outlines the general requirements for the repair of painted/coated surfaces.
Touch-up materials are required to meet a coating thickness of at least 2.0 mils (50.8 µm) for one application, and the final coating thickness of the repair area is dictated by the material used to do the repair. ASTM A780 contains three acceptable methods of touch-up and repair of hot-dip galvanized steel:
This how-to video introduces the process of touch-up and repair for hot-dip galvanized steel, which is key to ensuring coating longevity and continued corros...
3 de jun. de 2015 · “How do I successfully touch-up galvanizing in the field?” This is a common question about substation and transmission structures. There could be a number of reasons why touch-ups may be necessary in the field. Extremely rough handling; Installation techniques; In-service conditions
26 de ene. de 2012 · There are methods available to ensure post-galvanizing coating integrity and ASTM A780, Standard Practice for Repair of Damaged and Uncoated Areas of Hot-dip Galvanized Coatings authorizes three accepted touch-up and repair methods: Applying zinc-rich paint. Coating with zinc solder. Spraying with molten zinc (metalizing)
