Investigations of Press Bonded Zinc-Rich Powder Coatings

Zinc-rich powder coatings (ZRPCs) are promising environmentally friendly alternatives to solvent-borne zinc-rich coatings. There are several difficulties and challenges with formulating and manufacturing these coatings. A novel technique without extrusion was assessed to avoid excessive wear of the screws during the conventional extrusion of zinc-rich powder coatings. ZRPCs were formulated by selecting a suitable polyester resin, determining the zinc content, additive dosages, etc., and applied as a single layer. An additional wetting agent further improved the surface quality. A double-layer system consisting of ZRPC as a basecoat and a polyester topcoat was designed. The PDMS as an additive imparted hydrophobicity and self-healing to both coatings. In addition, a 30% recovery of self-healing efficiency was provided by PDMS after the wiping test. The coating system exhibited superior corrosion resistance in a 3000-h neutral salt spray test. The formulation offers novel ways to manufacture high-performance powder coatings for heavy-duty applications.

Name thesis:degree_name

M Eng Sci

Discipline thesis:degree_discipline

Chemical and Biochemical Engineering

Grantor dc:publisher

The University of Western Ontario

Year dc:date.issued

2023

Author dc:creator

• Zhu, Wenhao

Advisors dc:contributor.advisor

• Zhu, Jesse
• Zhang, Hui

• Zinc-rich
• powder coatings
• ZRPCs
• anti-corrosive
• hydrophobic
• self-healing.

Language dc:language.iso

en_ca

Handle dc:identifier.uri

https://hdl.handle.net/20.500.14721/32775

OAI identifier oai:identifier

oai:uwo.scholaris.ca:20.500.14721/32775