Silane Coating with Polyether Copolymer for Uniform Metal Passivation
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Solution Overview
Problem
Current silane-based coatings for metal surfaces often exhibit non-uniform film thickness, leading to inadequate adhesion and corrosion protection, and there is a need for a chromium and phosphate-free solution that provides enhanced corrosion resistance and paint adhesion.
Innovation Solution
A silane coating composition containing a silicon-based copolymer is applied to metal surfaces, comprising a silane compound and a silicon-based polyether copolymer, which forms a uniform conversion or passivation coating, improving corrosion resistance and adhesion without using chromium or phosphates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If silane-based conversion coatings are used to replace chromium and heavy metal phosphate coatings, then environmental safety is improved, but film thickness uniformity deteriorates
Solution Approach 1:
The patent combines silane compounds with silicon-based polyether copolymers to create a composite coating formulation. This composite approach allows the silane to provide corrosion protection while the polyether copolymer ensures uniform film formation, resolving the contradiction between environmental safety and film thickness uniformity
Solution Approach 2:
The silicon-based polyether copolymer acts as an intermediary substance that mediates between the silane compound and the metal substrate. It facilitates uniform film formation and leveling, enabling the silane-based coating to achieve both environmental safety and manufacturing precision
2Ease of operation
If non-uniform film thickness occurs in silane-based coatings, then application simplicity is improved, but adhesion and corrosion protection deteriorate
Solution Approach 1:
The patent modifies the chemical composition parameters of the coating formulation by incorporating silicon-based polyether copolymers with specific molecular structures and ratios. This parameter change enables the coating to maintain simplicity of application while achieving uniform film thickness that ensures reliable adhesion and corrosion protection
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a uniform, chromium-free, and phosphate-free coating that enhances corrosion resistance and paint adhesion on metal surfaces, ensuring improved performance and environmental sustainability.
Implementation Method 1
The methods of the invention comprise contacting the requisite metal surface with an aqueous solution of silane compound and a silicon-based polyether copolymer. After contact of the metal surface with the above treatment, the treatment may be dried in place to form the desired coating.
Data Source
AI summary
A silane coating composition containing a silicon-based copolymer, a method for treating the surfaces of a metal such as steel, zinc-coated steels, or aluminum, to provide for the formation of a uniform conversion and/or passivation coating which increases the corrosion resistance of bare or painted metal and/or the adhesion properties of the metal, along with a metal having a conversion and/or passivation coating applied thereto are disclosed. Methods of the invention include contacting the requisite metal surface with an aqueous solution of a silane compound and a silicon-based polyether copolymer.