Investigations of Press Bonded Zinc-Rich Powder Coatings
type: CreativeWork
description: 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.
abstract: 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.
author: Zhu, Wenhao
language: en_ca
keywords: Zinc-rich, powder coatings, ZRPCs, anti-corrosive, hydrophobic, self-healing.
date published: 2023-02-02
date modified: 2026-07-27T21:55:59Z
provider: Western University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: The University of Western Ontario

PropertyValue
property ID: Handle
value: https://hdl.handle.net/20.500.14721/32775