Water-Based Coating System for Corrosion Resistance and Low Emissions
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Solution Overview
Problem
The intermodal cargo container industry faces challenges in finding durable, corrosion-resistant, and environmentally friendly water-based coating systems that can withstand harsh environments and meet stringent performance standards, as conventional water-based systems often fail salt spray testing and exhibit poor durability.
Innovation Solution
A water-based coating system incorporating a chlorinated resin primer and a high-pigment topcoat composition, which provides excellent adhesion, heat resistance, and corrosion protection, while reducing emissions and factory pollution, and can be applied as a two-coat system to meet industry standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water-based coating systems are used to reduce environmental impact and emissions, then environmental friendliness is improved, but adhesion to underlying surfaces and salt spray resistance deteriorate
Solution Approach 1:
The invention modifies the chemical composition parameters of the water-based coating by incorporating specific resin systems (epoxy, polyester, polyurethane) and controlling pigment volume concentration (PVC) within 5-40%, along with specific additives, to achieve both environmental friendliness and reliable adhesion and salt spray resistance
Solution Approach 2:
The invention uses composite coating formulations combining multiple resin types (epoxy, polyester, polyurethane) with carefully selected pigments and additives to create a water-based system that achieves performance comparable to solvent-based systems while maintaining environmental benefits
2Duration of action of stationary object
If high pigment loading is used to enhance durability and thermal protection, then service life is improved, but application viscosity and drying time increase
Solution Approach 1:
The invention optimizes the pigment volume concentration parameter within 5-40% range and controls the water content (60-90% of total composition) to balance pigment loading benefits with acceptable viscosity and drying characteristics for practical application
Data Source
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AI summary
The present invention relates to a method of coating a metallic surface of an article as well as a method of making a coating composition.