Grantee Research Project Results
Low-Cost, Environmentally Benign, Non-Chromated Corrosive Resistant Coatings
EPA Contract Number: 68D70055Title: Low-Cost, Environmentally Benign, Non-Chromated Corrosive Resistant Coatings
Investigators: Zheng, Haixing
Small Business: Chemat Technology Inc.
EPA Contact: Richards, April
Phase: II
Project Period: September 1, 1997 through September 1, 1999
Project Amount: $225,000
RFA: Small Business Innovation Research (SBIR) - Phase II (1997) Recipients Lists
Research Category: SBIR - Pollution Prevention , Nanotechnology , Pollution Prevention/Sustainable Development , Small Business Innovation Research (SBIR)
Description:
Chromate conversion coatings are widely used in industries to protect light metals (e.g., aluminum alloys) from corrosion. However, hexavalent chromium involved in the process is considered to be carcinogenic. The development of non-chromate environmentally benign conversion coatings is mandated. Currently, the only alternative process available is the use of non-chromate sealed anodized coatings, which is unfortunately costly. In the Phase I project, Chemat Technology successfully demonstrated the feasibility of using their proprietary sol-gel derived coatings with the sealants and corrosion inhibitors as the non-chromated corrosion resistance coating. Thick coatings with excellent metal adhesion and superior corrosion resistance have been demonstrated. Topcoats (paints) also can adhere to the coating well. No paint-primer is needed in this system - the coating can actually be used as a permanent surface pretreatment and primer. Longer lifetime with much less replacement of surface pretreatment and primers can be expected, resulting in much lower process and maintenance costs. Most importantly, utilization of non-chromated conversion coatings eliminates the use of carcinogenic chromate, which improves worker safety; reduces the cost associated with hazardous material handling, storage, and disposal; and reduces significantly the use of the rinsing water, thus reducing cost associated with treatment of wastewater. After developing and commercializing this sol-gel process in the Phase II program, a low-cost, environmentally benign process for non-chromated, permanent corrosion resistance coatings can be developed.Publications and Presentations:
Publications have been submitted on this project: View all 1 publications for this projectSupplemental Keywords:
small business, SBIR, wastewater treatment, pollution prevention, engineering, chemistry., Sustainable Industry/Business, RFA, Scientific Discipline, Waste, Toxics, Technology for Sustainable Environment, Chemical Engineering, Engineering, Chemistry, Sustainable Environment, hexavalent chromium, Environmental Chemistry, 33/50, Chemistry and Materials Science, cleaner production/pollution prevention, hexavalent chromium waste, Environmental Engineering, chromium & chromium compounds, pollution prevention, environmentally benign coatings, Chromium, coatings, environmentally benign coating, non-toxic hard chromium coatings, chromate substitution, conversion coating, non chromated conversion coatings, corrosion resistantProgress and Final Reports:
SBIR Phase I:
Low-Cost, Environmentally Benign, Non-Chromated Corrosive Resistant CoatingsThe perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.