-13-10.PAINTING WORKS AND CHECK POINTS FOR INSPECTIONThe painting work must be well controlled to ensure the rust-preventive performance of the paint.Many factors must be considered as shown below.Below is one of the most typical application procedures.[Flow Chart][Application Procedure][Check Point for Inspection](Mill)Surface PreparationShop Primer CoatingTransportation(Assembly)Surface PretreatmentSurface PreparationPrimer CoatingIntermediate CoatingInspection"Shop primer fabrication system" as described on Page 14.If the steel surface is wet, is should be dried using an air-blower or ventilator. Grease, oil and similar matters shall be removed by solvent cleaning.Remove mill scale, rust and old paint film on the steel surface to the specified surface preparation degree by blast cleaning or by power tool cleaning.The painting shall be done in such manners as to avoid any grazing, sagging or over spraying and to secure the specified paint film thickness. The edges and holes where the specified film thickness is hard to obtain shall be brushed in stripes prior to overcoating.(Some steels are not shop-primed)NoNoNoNoNoYesYesYesYesCCCC(Shop)1. Moisture on steel surface2. Existence of grease, oiland similar matters1. Environmental conditions(Climate, relative humidity, condition of substrate)2. Degree of cleaning(Removal of rust, surfaceroughness)1. Environmental conditions2. Check of paint & thinner3. Mixing & thinning ratio4. Pot life5. Drying time & overcoatinginterval6. Appearance of wet & dryfilm7. Wet & dry film thickness.SSPC PA 2 is commonlyrecommended to measurethe dry film thickness.