DEVELOPMENT OF FLY-ASH BASED GEOPOLYMER FOR CORROSION RESISTANT COATING

Production of fly ash is 6 x I 08 ton annually and is projected to increase. Only 20% is utilized in
construction industry and the rest 80% goes to landfills. It had been reported that geopolymer has
high resistance to corrosion attack. This project aims to investigate the feasibility of fly ash based
geopolymer as corrosion resistant coating. The properties studied are compressive strength,
setting time, chemical leaching, resistance to chemical attack, adhesive strength, water
absorption, density change and microstructure evolution. Steel plates coated with the geopolymer
had been tested in simulated corrosive environment. The geopolymer has high compressive
strength, little chemical leaching, low water absorption, short setting time and increasing density
pattern. Based on the results, it is believed that fly ash based geopolymer is feasible to be used as
base material for corrosion resistant coating. Thusly, this project is a step towards increasing
knowledge of industrial waste utilization by adding value to fly ash to convert it to geopolymer.
Its success may benefrt to reserve finances and at the same time to accentuate our affirmation in
environmental guardianship.