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I <br /> 1 6-07.AP6 <br /> 2 Section 6-07, Painting I <br /> 3 January 5, 2015 <br /> 4 6-07.3 Painting I <br /> 5 This section is supplemented with the following new subsections: <br /> 6 <br /> 7 6-07.3(14) Metallic Coatings <br /> 8 <br /> 9 6-07.3(14)A General Requirements <br /> 10 This specification covers the requirements for thermal spray metallic coatings, with <br /> 11 and without additional paint coats, as a means to prevent corrosion. <br /> 12 <br /> 13 The coating system consists of surface preparation by wash cleaning and abrasive , <br /> 14 blast cleaning, thermal spray application of a metallic coating using a material <br /> 15 made specifically for that purpose, and, when specified, shop primer coat or shop <br /> 16 primer coat plus top coat in accordance with Section 6-07.3(11)A. The system also <br /> 17 includes inspection and acceptance requirements. <br /> 18 <br /> 19 6-07.3(14)B Reference Standards <br /> 20 SSPC-SP 10/NACE No. 2 Near White Blast Cleaning <br /> 21 SSPC CS 23.00 Guide for Thermal Spray Metallic Coating Systems <br /> 22 ASTM-C-633 Standard Test Method for Adhesion or Cohesion <br /> 23 Strength of Thermal Spray Coatings <br /> 24 ASTM D 4417 Standard Test Methods for Field Measurement of <br /> 25 Surface Profile of Blast-Cleaned Steel <br /> 26 ASTM D 6386 Standard Practice for Preparation of Zinc (Hot-Dip <br /> 27 Galvanized) Coated Iron and Steel Product and <br /> 28 Hardware Surfaces for Painting <br /> 29 ASTM D 4541 Standard Test Method for Pull-Off Strength of Coatings <br /> 30 Using Portable Adhesion Testers <br /> 31 ANSI/AWS C2.18 Guide for the Protection of Steel with Thermal Sprayed <br /> 32 Coatings of Aluminum, Zinc and their Alloys and <br /> 33 Composites <br /> 34 <br /> 35 6-07.3(14)C Quality Assurance <br /> 36 A representative sample of each lot of the coating material used shall be submitted <br /> 37 to the Engineer for analysis prior to use. Zinc shall have a minimum purity of 99.9 <br /> 38 percent. Zinc Aluminum 85/15 wire shall be 14 percent minimum to 16 percent <br /> 39 maximum aluminum. II <br /> 40 <br /> 41 The thermal sprayed coating shall have a uniform appearance. The coating shall <br /> 42 not contain any blisters, cracks, chips or loosely adhering particles, oil or other <br /> 43 surface contaminants, nodules, or pits exposing the substrate. <br /> 44 <br /> 45 The thermal spray coating shall adhere to the substrate with a minimum bond of <br /> 46 700 psi. The Contractor's QA program shall include thermal spray coating bond <br /> 47 testing. <br /> 48 I 49 The Engineer may cut through the coating with a knife or chisel. If upon doing so, <br /> 50 any part of the coating lifts away from the base metal 1/4 in. or more ahead of the <br /> I <br /> AMENDMENTS TO THE 2014 STANDARD SPECIFICATIONS BOOK <br /> I <br /> Revised: 8/3/15 <br />