• Ppg Coating Application Manual Magnet

PPG Aerospace is a leading supplier of transparencies, sealants, coatings, paint removers and cleaners, chemical management and packaging, offering the most comprehensive range of materials available from a single source to airframe manufacturers, and airline operators. We supply advanced products to all the commercial, regional, general aviation and military customer segments. AIRCRAFT SEALANTS PRC® and Pro-Seal™ sealants seal the structures of most of the world’s aircraft. The industry’s most comprehensive range of sealants for aircraft structures includes products for fuel tanks, aerodynamic sealing, interfay sealant and windshield installation. Local application support centres provide Semkit® packages, premixed and frozen sealant, and innovative custom sealant solutions such as PRC® seal caps and PRC® FIP strip sealant that offer time, labour and quality benefits. AIRCRAFT COATINGS AND PAINT STRIPPERS AND CLEANERS Thousands of aircraft worldwide are decorated and protected by Desothane® HS topcoat. PPG’s global flagship coating, it is the only low-VOC topcoat approved by both Boeing and Airbus.

Recommended Techniques for Washing Glass Page 1 of 19 PPG Industries, Inc. Occasionally after coating application) and cannot be observed by the naked eye. At this stage, with uncoated glass, it may be. Rubs encountered with manual packing procedures. The powder interleaving is also.

Ppg Coating Application Manual Magnet

Aircraft manufacturers, airlines and maintenance operations rely on PPG’s complete line of aircraft coatings from primers for composite and metallic airframes to topcoats in standard, metallic and mica colours. Innovative Selectively Strippable Systems combine long-term performance with efficient topcoat removal for repainting. Eldorado maintenance chemicals are now produced by PPG. These well-known environmentally friendly products include paint and coating removers, US military approved products and interior and exterior aircraft cleaners. TRANSPARENCIES AND WINDSHIELDS More commercial, military and business aviation pilots fly behind our windshields than any other. Design capabilities include glass, acrylic and polycarbonate substrates with advanced-technology coatings and liners for specific performance characteristics, heating systems to meet flight requirements, edge attachments for load-carrying capabilities and interlayers that adhere structural plies.

PPG advancements include Herculite® technology that revolutionized windshield weight and service life. CHEMICAL MANAGEMENT PPG Total Service Solutions (TSS) is a turnkey outsourcing program for chemical and fluid management, process management and logistics through their life cycle. PPG integrates and takes over key functions for the chemical logistics supply chain, freeing aircraft manufacturers and airlines from the time-consuming chemicals management tasks and in turn reduce their associated costs. Programs are custom designed to include sourcing, shelf-life management, incoming quality testing, point-of-use stocking and environmental tracking all performed by PPG Aerospace. SEMCO® PACKAGING AND APPLICATION SYSTEMS Semco® Packaging & Application Systems offer customers creative solutions for packaging and dispensing single- and two-component adhesives, sealants and coatings.

These customised solutions afford convenient storage, accurate mixing, ease of application and reduced waste of coating materials, assembly fluids and sealants. With the industry’s widest range of dispensing guns, mixers, cartridges, nozzles and syringes, PPG is able to meet customer needs for exacting application of the smallest amounts of material. AEROSPACE APPROVALS PPG Aerospace has a wide range of approvals from almost every aircraft OEM in both the civil and military markets around the world. For a full list of certifications and product approvals please follow the link to our web site. LOCAL SUPPORT GLOBALLY PPG Aerospace delivers global support on a local basis with a unique network of 15 application support centres strategically located at key aerospace centres around the world. These certified centres are designed to provide convenient channels of distribution and ensure fast and efficient product availability with technical service into their local markets.

General Surface Preparation Requirements For Performance Coatings Governing industry standards for surface preparation are set forth by organizations such as the Society of Protective Coatings (SSPC), NACE International, the International Standards Organization (ISO), and the International Concrete Repair Institute (ICRI). Many of the published standards can be cited interchangeably.

Regardless of the substrate, the degree of adhesion and level of performance of protective coatings is dependent on the degree of surface preparation obtained. A properly prepared surface has the following characteristics:. Sound and cohesively strong. Clean and free of loose particles and contaminants. Dry. Exhibits a surface (anchor) profile for maximum adhesion of protective coatings It is self-evident that surfaces must be clean for good coating adhesion. This means any oil, grease, chemicals, and particulate residues should be removed from the surface.

The governing standard for removing visible contaminants from steel surfaces is SSPC SP-1. This can be accomplished by several methods including wiping the surface with volatile solvents or power washing with or without emulsifying cleaners. Achieving an SSPC SP-1 criteria is a pre-requisite to any of the other SSPC surface preparation requirements. In many cases such as coastal environments, mining, or some industrial processes, the surface has been exposed to soluble salts. Relatively low levels of soluble salts on the surface can cause premature coating failures. The soluble salts form an electrolytic solution which accelerates the rate of corrosion. Further, the soluble salts “pull” water through the coating film through osmotic pressure.

This results in blistering of the coating. Depending on the service, there are varying levels of soluble salt levels recommended by PPG as detailed in the Appendix. Prior to abrasive blasting and subsequent coating application, it is important to address surface defects in structural steel and other metallic substrates such as rough welds, weld spatter, flame cut edges, laminations, protrusions, and sharp edges. NACE SP-0178 may be used as a guideline for specifying the degree of mechanical surface preparation required. In general, it is recommended to remove any embedded weld spatter, laminations, or other protrusions which may not be covered by the protective coatings. For immersion service, rough or sharp edges should be ground to produce a smooth, rounded surface. Welds in immersion service should be ground to a condition “D” or smoother as per NACE SP-0178.

For immersion or high temperature service, a higher level of weld preparation should be specified. Preparation of Mild (Carbon) Steel Carbon steel is processed from a very stable raw material, iron ore.

For the remainder of its service life, steel has the tendency to transform back into oxide or “rust”. Protective coatings are the primary method for preserving steel structures. New hot rolled steel develops a hard oxide layer called mill scale.

It has a bluish-black appearance. The mill scale is electro-chemically cathodic to the underlying steel layers and as such will promote corrosion at varying rates depending on the prevailing environmental conditions. This being the case, mill scale should be removed prior to application of coating systems where long service lives are expected. There are several processes available to prepare steel for coating application.

Some common methods are as follows: Dry Abrasive Blasting Thorough blast cleaning with the proper abrasive is generally considered to be the best method for preparing steel. The applicable standards for blasting area as follows: SSPC SP-5 / ISO 8501-1 Sa 3 / NACE 1 – White Metal Blast Cleaning requires the surface to be free of oil, grease, dirt, mill scale, rust, corrosion products, oxides, coatings, or foreign matter. Each square inch of surface area shall be completely free of all visible residues. Since SSPC SP-5 does not allow for any level of rust staining in the substrate, it is often considered to be too stringent for practical specification. SSPC SP-6 / ISO 8501-1 Sa 2 / NACE 3 – Commercial Blast Cleaning requires removal of mill scale, rust scale, coatings, oil, grease, dust, dirt, oxides, corrosion products, and other foreign matter. Random staining must be limited to no more than 33% of each unit area of surface (3-inch x 3-inch area) and may consist of light shadows, slight streaks, or minor discolorations caused by stains of rust, stains of mill scale, or stains of previously applied coating. An SSPC SP-6 standard is commonly specified for fabricated structural steel projects for atmospheric service environments.

SSPC SP-10 / ISO 8501-1 Sa 2.5 / NACE 2 – Near White Metal Blast Cleaning requires the surface to be free of all visible oil, grease, dust, dirt, mill scale, rust, coating, oxides, corrosion products, and other foreign matter. Random staining must be limited to no more than 5% of each unit area of surface (3 inch x 3 inch), and may consist of light shadows, slight streaks, or minor discolorations caused by stains of rust, stains of mill scale, or stains of previously applied coating. An SSPC SP-10 is the typical standard for preparation of steel for immersion, high temperature or other aggressive environments. Abrasive Selection There are many abrasives available for blasting.

Common blasting abrasives include:. Steel grit Coal slag. Staurolite Copper slag. Garnet Aluminum oxide.

Glass beads Steel shot. Silica sand Steel shot/grit mixtures Abrasives are generally selected on the following attributes: Size, Shape, Material and Hardness:. Large particle sizes and heavier abrasives contain more impact energy and produce deeper profiles.

Smaller abrasives are beneficial for scouring and light cleaning. Smaller abrasives also increase the number of impacts per area, effecting a more dense profile. Shot spheres have an efficient geometry which maximizes the amount of weight per volume, thereby maximizing impact energy. However, angular abrasives (grit, amorphous shapes, etc.) are often specified to produce an angular profile which enhances adhesion of coatings.

Material – Ferrous abrasives are effective and widely used, but they are prone to corrosion if left embedded in the surface. They also have the benefit of being recycled and separated from other residue using magnetic attraction. Other abrasives are selected due to their level of cleanliness (such as the degree of salt contamination) or due to toxicity concerns. Hardness – Harder abrasives are more resistant to wear and degradation. This maximizes the service life. Sufficient hardness is also needed to properly profile substrates which are very hard (or very soft).

Power Tool Cleaning Power tool cleaning employs the use of angle grinders fitted with abrasive discs, wire wheels or cup brushes, needle guns, and power sanders to remove loose rust and paint from the surface and in some cases to produce a profile. SSPC SP-3 requires the removal of all rust scale, mill scale, loose paint, and loose rust to the degree specified by the use of various power tools. The substrate should have a pronounced metallic sheen and also be free of oil, grease, dirt, soil, salts, and other contaminants.

The surface should not be buffed or polished smooth. SSPC SP-3 is suitable for maintenance operations and spot repairs in atmospheric exposures. SPC SP-11 requires the surface to be free of all rust scale, mill scale, rust, paint, oxides, corrosion products, and other foreign matter by the use of various power tools. Slight residues of rust and paint may be left in the lower portions of pits if the surface is pitted. The surface must be roughened to a degree suitable for the specified paint system and must have a surface profile of not less than 1 mil (25 microns). SSPC SP-11 is often specified in lieu of SSPC SP-3 in applications where spot repairs are mode for coating systems in immersion service or other severe service environments.

SSPC SP-15 is Commercial Power Tool Cleaning. It is a modification of SSPC SP-11 which allows for up to 33% rust staining over the surface. Hand Tool Cleaning Hand tool cleaning employs scrapers, wire brushes and chipping hammers, and manual sanding. Hand tool cleaning is chosen when other methods are not practical such as remote or inaccessible areas.

The quality of surface preparation is not optimum and the service life of coatings will be limited as compared to other surface preparation methods. However, it is often sufficient for maintenance painting to clean all loose corrosion products, mill scale, and coatings in order to achieve sufficient adhesion for the purposes. SSPC SP-2 is a common standard for the use of hand tools to prepare steel for painting. This standard requires the removal of all rust scale, mill scale, loose paint, and loose rust to the degree specified by the use of various power tools.

The substrate should have a pronounced metallic sheen and also be free of oil, grease, dirt, soil, salts, and other contaminants. The surface should not be buffed or polished smooth. SSPC SP-2 is suitable for maintenance operations and spot repairs in mild-to-moderate atmospheric exposures where abrasive blasting is not possible or practical.

Chemical Treatments Chemical conversion coatings usually involve phosphoric acid solutions applied via a dip or spray process to produce a surface rich in iron phosphate, zinc phosphate, or manganese phosphate. The crystalline phosphatized surface is porous and allows protective coatings to form a mechanical bond. Further, the phosphatized surface is less corrosive than the underlying steel. Water Jetting Water jetting employs the use of water pumped to pressures greater than 10,000 psi and sprayed via a lance on the substrate. Water jetting is typically used for maintenance and repair operations. It has found wide acceptance in shipyards and in other industries where large, continuous, flat surfaces are to be prepared. Water jetting can be a cleaner alternative to abrasive blasting where the contamination, dust/particulate generation, and clean-up of spent abrasive is undesirable.

Further, the water from water jetting has the added benefit of reducing the level of soluble (salt, et al) contaminants. Though water jetting cannot produce a surface profile on metal substrates, it can remove tightly adherent coatings and corrosion products. Use of pressures in excess of 30,000 psi is categorized as Ultra-High Pressure Water Jetting. Pressures in this range are capable of removing all coatings and tightly adherent mill scale. The SSPC water jetting standards are closely aligned with the abrasive blasting standards with graduated degrees of surface cleanliness as follows:. SSPC WJ-1 Clean to Bare Substrate. SSPC WJ-2 Very Thorough Cleaning.

SSPC WJ-3 Thorough Cleaning. SSPC WJ-4 Light Cleaning With wet cleaning methods, flash rusting is almost unavoidable. The rate of flash rusting is dependent on surface cleanliness, water quality and chemistry, surface temperatures, and environmental conditions. Per the SSPC standards, flash rusting is classified into Light, Medium and Heavy. Heavy flash rusting is generally considered to be deleterious to coating adhesion and performance. Light and Medium flash rust levels may be acceptable for coating application. Wet Abrasive Blasting Wet abrasive blasting is a surface cleaning technique which utilizes various configurations for injection of blasting abrasives into a high pressure water stream or shrouding a blast nozzle with a water ring to mitigate dust generation.

Wet abrasive blasting utilizes attributes of both water jetting and dry abrasive blasting to produce a clean surface using a dust-free method along with a surface profile. Preparation of Non-Ferrous Metal and Stainless Steel Common non-ferrous metal substrates include aluminum, copper, brass and tin. For optimum performance and for coatings specified in aggressive service conditions, PPG recommends brush blasting the substrate using an angular non-metallic abrasive to produce a uniform and dense anchor profile in accordance with the specified product requirements.

The applicable specification for this is SSPC SP-16. For thin film coating systems (.