Metal Surface Coating Composition for Terminal-Fitted Electric Wire
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Solution Overview
Problem
Existing metal surface coating compositions for electric wires fail to provide uniform coating and long-term corrosion resistance, especially at the electric connection points between terminals and conductors.
Innovation Solution
A metal surface coating composition containing a high-consistency material with a lubricant base oil and an amide compound, combined with a phosphorus compound and a metal, and a nucleating agent, which promotes uniform coating and enhanced corrosion resistance by forming a stable, adhesive film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional grease is applied to metal surfaces, then corrosion resistance is provided, but uniform coating is not achieved
Solution Approach 1:
The invention uses a composite material system comprising a lubricant base oil, amide compound, phosphorus compound, metal particles, and nucleating agent. This composite formulation creates a multi-component coating that achieves both uniform application and durable corrosion protection, resolving the contradiction between coating uniformity and corrosion resistance.
Solution Approach 2:
The invention modifies the chemical composition parameters of the coating by incorporating specific ratios of amide compounds (5-50 mass%), phosphorus compounds (1-20 mass%), and metal particles (1-30 mass%). These parameter adjustments enable the coating to achieve optimal uniformity and adhesion while maintaining long-term corrosion resistance.
2Reliability
If coating is applied to electric connection parts, then corrosion resistance is improved, but coating durability under bending stress is reduced
Solution Approach 1:
The invention applies coating with localized properties by incorporating metal particles (1-30 mass%) that provide enhanced mechanical strength and adhesion at the electric connection parts. The nucleating agent (0.01-15 mass%) creates localized crystalline structures that improve coating flexibility and resistance to bending stress, ensuring durability while maintaining corrosion protection.
Solution Approach 2:
The coating formulation includes amide compounds and phosphorus compounds that create a flexible, adhesive film before bending stress occurs. This pre-formed resilient structure cushions against subsequent mechanical stress from wire bending, preventing coating failure and maintaining long-term durability and corrosion resistance.
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 composition ensures a uniform and durable coating that provides long-term corrosion resistance to the electric connection points, preventing moisture intrusion and maintaining waterproofness even when the wire is bent.
Implementation Method 1
a high-consistency material containing a lubricant base oil and an amide compound, a composition of a phosphorus compound and a metal, and a nucleating agent
Implementation Method 2
a composition of a phosphorus compound containing one or more compounds represented by the general formulae (1) and (2) and a metal
Data Source
AI summary
A metal surface coating composition and a terminal-fitted electric wire which is anti-corrosion treated with the composition are provided. The composition includes a high-consistency material containing a lubricant base oil and an amide compound, a composition of a phosphorus compound containing one or more compounds represented by the below formulae and a metal, and a nucleating agent:where X1 to X7 each represent an oxygen atom or a sulfur atom, R11 to R13 each represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, among which at least one is a hydrocarbon group having 1 to 30 carbon atoms, and R14 to R16 each represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms among which at least one is a hydrocarbon group having 1 to 30 carbon atoms.