Biological cleaning integrates two proven technologies: emulsion cleaning and bioremediation. This process has the advantage that the removed oils and greases are digested by the microbial action rejuvenating the cleaner and extending its life. Biological cleaners have been used effectively in many metal working and metal finishing industries during the last twenty years. Recently a major new area has opened up for this technology in the preparation of metal surfaces for organic coatings. This paper will review the background and industrial experience of biological cleaning for organic coatings, especially in the area of powder coatings.
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