Anticorrosive Agent Viscosity Control for Terminal Wire Corrosion
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Solution Overview
Problem
The existing metal surface coating compositions used for anticorrosion treatment in terminal-fitted electric wires tend to leak when exposed to high temperatures due to the absorption of plasticizers from the covering member, leading to a decrease in anticorrosion properties.
Innovation Solution
A specialized anticorrosive agent is developed, comprising a base oil with a viscosity of 30 mPa·s or higher at 100° C. and a metal adsorbent containing a phosphorus compound, with a specific mass composition ratio of 50:50 to 98:2, which enhances adhesion and retention on the metal surface, preventing leaks and maintaining anticorrosion properties even at high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal surface coating composition containing base oil and metal adsorbent is used for anticorrosion treatment, then excellent coating property is achieved, but the composition leaks from the connection part when exposed to high temperature
Solution Approach 1:
The patent changes the viscosity parameter of the base oil by selecting oils with specific viscosity ranges at different temperatures. The base oil is required to have viscosity of 50-5000 mm²/s at 25°C and 10-500 mm²/s at 100°C, which prevents leakage while maintaining coating properties. This parameter optimization resolves the contradiction between maintaining anticorrosion effectiveness and preventing substance loss at high temperatures.
Solution Approach 2:
The patent uses a composite formulation consisting of base oil, metal adsorbent (5-50 mass%), and optional additives. This composite structure combines materials with complementary properties: the base oil provides viscosity control, the metal adsorbent provides corrosion protection, and additives enhance specific functions. The synergistic combination maintains coating integrity and prevents leakage while preserving anticorrosion properties.
2Reliability
If grease is used for corrosion resistance, then corrosion protection is provided, but it is difficult to apply thinly and uniformly due to high viscosity at room temperature
Solution Approach 1:
The patent selects base oils with carefully controlled viscosity parameters: 50-5000 mm²/s at 25°C and 10-500 mm²/s at 100°C. This viscosity range ensures the composition remains fluid enough for easy application and thin uniform coating at room temperature, while maintaining sufficient thickness and adhesion at operating temperatures for effective 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 anticorrosive agent effectively maintains its anticorrosion properties by suppressing the migration of plasticizers and ensuring excellent adhesion to the metal surface, preventing leaks and maintaining corrosion protection even when the terminal-fitted electric wire is exposed to high temperatures.
Implementation Method 1
a base oil (A) having a viscosity of 30 mPa·s or higher at 100° C.
Implementation Method 2
a metal adsorbent (B) containing a phosphorus compound
Data Source
AI summary
An anticorrosive agent maintains its anticorrosion property when the agent is applied to the connection part of the terminal-fitted electric wire containing a covering member containing a plasticizer, and is exposed to high temperature. A terminal-fitted electric wire improves in anticorrosion property by using the agent. The anticorrosive agent contains a base oil (A) having a viscosity of 30 mPa·s or higher at 100° C., and a metal adsorbent (B) containing a phosphorus compound. The mass composition ratio (A):(B) of the base oil (A) and the metal adsorbent (B) is within a range of 50:50 to 98:2. In the terminal-fitted electric wire, an electric connection part between a terminal and an electric conductor is covered with a film of the anticorrosive agent.