Waterborne paints storage

Corrosion-resistant and wear-resistant materials (e.g., stainless steel and in special cases suitable plastics) have to be used for the equipment required to produce and apply waterborne paints. This applies to production vessels, storage and transportation vessels, to the feed system used for application (e.g., closed circuit tanks, pipelines, and pumps) all of which must be able to withstand chemical mechanical stress. The use of corrosion-resistant materials for the spraying equipment is also advantageous. 

Waterborne paints should be protected against frost during storage. In general, storage areas do not have to satisfy special fire prevention regulations. 

Mercury compounds were at one time used as a bactericide and a fungicide in waterborne paints. A bactericide is needed to prevent bacteria growth during storage of the sealed paint can. A fungicide is needed to prevent mildew growth on the cured paint film under humid conditions. Wicks et al. [4(i)] give the modern-day replacements for the earlier mercuiy compounds. 

Waterborne storage of damaged NS is accompanied by continuous contamination of water area. Only peeling of their rust and paint has resulted in persistent contamination of aquatic systems including bottom sediments. Specific activity of water exceeds the background values by a factor of 2 dose rate values on sea bottom reach 140 mR/h. 

Heating oil storage premises must be equipped with a collection trap so that any heating oil leaking from the tank cannot contaminate the soil. The interior of these premises must be painted with an officially approved coating material that is not dissolved or penetrated by heating oil. The coating must also cover cracks in the substrate. Multilayer systems based on waterborne acrylic resin dispersions are suitable for this purpose. 

H. Matsuki, R. Nishida, and M. Murata. Storage-stable one-liquid waterborne epoxy resin dispersions for coatings with good thamal curability and resistance to corrosion and impact. JP Patent 2 003 253 004, assigned to Kansai Paint Co., Ltd., Japan, September 10,2003. 

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