Painting operation

Sodium alumiaate is an effective precipitant for soluble phosphate ia sewage and is especially useful ia wastewater having low alkaliaity (20,21). Sodium alumiaate hydrolyzes ia water to Al(OH)2 and Al" which precipitate soluble phosphate as aluminum phosphate [7784-30-7], AlPO. Sodium alumiaate has also been described as an effective aid for the removal of fluorides from some iadustrial waste waters (22). Combiaations of sodium alumiaate and other chemicals are being used to improve the detackification of paint particles ia water from spray-painting operations (23). 

J. Berry, "Control of Volatile Organic Compound (V OC) Emissions from Painting Operations ia the United States," Polymers Paint Colour J. 181(4281), (Apr. 17,1991). 

Ensure that all blasting and painting operations are carried out without contravention of safety regulations. 

Colorability is another reason IDs select plastics for many products. Molding color into a product eliminates finishing and painting operations, thus reducing costs. Beyond cost, integral color also masks the nicks, chips and scratches that impair appearance during the life of the product. Color effects are almost limitless. Transparent, translucent, pearlescent, fluorescent, or marbleized colors are readily available for use in plastics. 

Xylene is used as a solvent in paint. A certain painting operation evaporates an estimated 3 gal of xylene in an 8-hr shift. The ventilation quality is rated as average. Determine the quantity of dilution ventilation air required to maintain the xylene concentration below 100 ppm, the TLV-TWA. 

PEN is a good candidate for labels where temperature tolerance is required, such as multi-layer labels for automobile bodies when being painted and dried at high temperatures. PEN is ideally suited for bar code labels where dimensional stability and registration are required at elevated temperatures. PEN labels have dimensional-excellence performance on printed circuit boards, in solvent- and aqueous-based painting operations, and in under-the-hood applications. PEN labels also provide substantially improved performance over PET or vinyl labels when the label must survive in harsh chemical environments. PEN performs extremely well in applications where the label must be in contact with organic solvents, such as acetone, ethers, toluene and phenol, as well as strong bases (30 % NaOH) and moderate acids. 

In order to obtain maximum corrosion protection for painted metal articles, the metal parts are pretreated with an inorganic conversion coating prior to the painting operation. These zinc or iron phosphate coatings greatly increase both paint adhesion and corrosion protection. Traditionally, a chromic acid post-treatment has been applied to these phosphatized metal surfaces to further enhance corrosion protection. 

Green tire painting Washdown, spills, air pollution equipment Organics and sohds from spray-painting operation soluble organics and solids from air pollution equipment discharge... 

Verhoeff, A.P., Suk, J. van Wijnen, J.H. (1988) Residential indoor air contamination by screen printing plants. Int. Arch, occup. environ. Health, 60, 201-209 Verschueren, K. (1996) Handbook of Environmental Data on Organic Chemicals, 3rd Ed., New York, Van Nostrand Reinhold, pp. 943-947 Vincent, R., Poirot, R, Subra, L, Rieger, B. Cicolella, A. (1994) Occupational exposure to organic solvents during paint stripping and painting operations in the aeronautical industry. Int Arch, occup. environ. Health, 65, 377-380... 

HDI is a monomer used in the production of polyurethane foams and other related products, and is found in some industrial paints and spray painting operations. It is a compound which reacts readily with water and alcohols (Von Burg 1993). It has a vapor pressure of 0.05 mm Hg at room temperature, but can be present in aerosol form allowing a potentially higher exposure to individuals. The HDI-BT trimer is often present for similar industrial uses. It would be expected to have a lower vapor pressure however, the aerosol form can also be present, allowing potentially higher exposure of HDI-BT to individuals. HDI reacts slowly with water to form carbon dioxide (HSDB 1996). The base-catalyzed reaction of HDI with alcohols should be carried out in inert solvents the reaction may occur with explosive violence in the absence of solvents (NFPA 1994). 

Rudzinski WE, Pin L, Sutcliffe R, et al. 1994. Determination of hexamethylene diisoeyanate in spray-painting operations using capillary zone electrophoresis. Anal chem 66(10) 1664-1666. 

Vincent R., Poirot, P, Subra, I., Rieger, B. Cicolelle, A. (1994) Occupational exposure to organic solvents during paint stripping and painting operations in the aeronautical industry. Int. Arch, occup. environ. Health, 65, 377-380... 

The most common method for cleaning the gun is to put a small amount of solvent into the pressure pot or cup gun, and clean the gun by spraying directly into the water curtain or dry filter of the spray booth. This is an unnecessary and expensive generation of waste. Both air emissions and waste paint are generated. In some states, notably California, regulations require that the paint operator spray gun cleaning solvents into a closed container so as to minimize VOC solvent emissions. This practice also allows recycling of the paint sprayed into the container (Joseph 1989). 

Indicates the deformation tendency of microcellular materials that may occur in painting operations during assembly. 

A demand of 200,000 of these 750 square inch body panels was assumed for a model year. Costs for painting are assumed to be constant and are not considered 1n this study. Rather costs are calculated to produce the body panel ready for the painting operation, Including any surface preparation and repair that might be required. 

The low heat sag values.relate to the ability of fabricated parts to withstand automotive assembly line paint bake-oven cycles— an ability which could eliminate the requirement for a separate offline painting operation and permit use of the same paints used for steel components. 

The waste water is composed of coolants, cutting oils, diesel fuel, lubrication oils, hydraulic oils, wash tank solutions, de-greasers, and phosphate rinse from the painting operation. A typical analysis of the waste water shows pH = 8... 

LaPuma PT, Bolch WE. 1999. The impact of recirculating industrial air on aircraft painting operations. Appl Occup Environ Hyg 14(10) 682-690. 

Hazards in spray painting operations, coating substitution, process substitution, ventilation, paint isolation, and work practices. 

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