Paints and Coatings油漆和涂料.doc

Paints and Coatings TECHNICAL GUIDE TG 09900 1. COORDINATION ISSUES: 1.1 Repainting: Coordinate the work of Guide Specification Section 09901with the State’s testing for lead containing paint (LCP) and requirements for procedures for disturbance, removal, encapsulation and disposal of LCP for this project. Refer to TG01715. 1.2 Factory and Shop Primed Surfaces: Address field applied finishes to be applied to factory or shop primed surfaces, especially for mechanical and electrical equipment. 2. DESIGN ISSUES: 2.1 Painting: For painting over concrete surfaces. Refer to Portland Cement Association article on painting concrete. 2.2 Repainting: 2.2.1 If existing work is badly rusted and its removal would destroy it or compromise its integrity, call for its removal and replacement. 2.2.2 Where the existing paint finish has failed (for example blistering, peeling, efflorescence, and other similar items) address its correction to ensure proper paint adhesion. Consultant shall perform adhesion testing on existing coats including subsurface coats in conjunction with consultant’s field investigation. 2.2.3 For existing acoustical tiles to be repainted, carefully check their condition to ensure that its surface will support and accept being repainted. Sometimes the materials surface delaminates upon paint application. 2.2.3 For repainting work, make a field check of existing door/jamb conditions. Where the space between the door and jamb is tight or if there are signs of binding or surfaceto surface contact, call for sanding of the door edge (wood doors) or adjustment of the door and/or frame (metal doors) to eliminate touching of newly painted surfaces. 2.3 Metal Roofs: 2.3.1 Fading: In the past, the majority of the metal roofs especially on the Big Island were field painted and finished using Portland Cement paints. Do not use or specify portland cement based paint for roof coatings. 2.3.1.2 As a guide: Unless the project requires special coatings for corrosion res