Advanced Coatings from Natural-Based Polymers for Metals
Abstract
In trying to replace coating materials or processes that generate environmentally degrading pollutants or emissions, the focus centered on the molecular modifications of the environmentally green natural polysaccharide biopolymers originating from pectin, starch, and chitosan as renewable agricultural and marine resources, and on assessing their potential as the corrosion-preventing water-based coatings for aluminum (Al) substrates. The modified polysaccharide coatings resolved the following five undesirable properties confronting the unmodified ones; (1) the settlement and growth of microorganisms in its aqueous solution, (2) the high susceptibility of film to moisture, (3) the poor chemical affinity of films for Al surfaces, (4) the weak adherence to polymeric topcoatings, and (5) the biodegradation of films caused by fungal growth, thereby resulting in a great film-forming performance, low susceptibility to moisture, low ionic conductivity, and excellent salt-spray resistance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2000
- Accession Number
- ADA384200
Entities
People
- Toshifumi Sugama
Organizations
- Brookhaven National Laboratory