Rust Preventive Oil Composition with Water and Additives
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Solution Overview
Problem
Conventional rust preventive oils for metal parts fail to provide an effective rust prevention over a long period, especially when rust-causing factors adhere to metal parts after various metalworking processes or assembly by bare hands.
Innovation Solution
A rust preventive oil composition comprising a base oil, water, and specific rust preventive additives such as sarcosine-type compounds, nonionic surfactants, sulfonate salts, esters, and boron compounds, with a kinetic viscosity of 20 to 100 mm2/s at 40° C, which maintains A-ranked rust development (0% rust development) for 10 or more hours in a neutral salt spray test.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heavy components such as wax and petrolatum are added to rust preventive oil to thicken the coating, then the rust preventive effect is enhanced, but the viscosity increases causing increased loss by adhesion, less degreasing, and deterioration of sprayability
Solution Approach 1:
The invention changes the chemical composition parameters by introducing specific rust preventive additives (sulfonate metal salts, sulfonate amine salts, carboxylic acids, esters, and amines) with controlled concentrations (0.1-10% by mass) to achieve long-term rust prevention without relying on heavy components like wax, thereby maintaining optimal viscosity for sprayability and degreasing performance
Solution Approach 2:
The invention creates a composite rust preventive oil formulation combining base oil with multiple functional additives working synergistically: rust preventive additives for corrosion protection, water for controlled emulsion formation, and specific concentration ratios that produce a multi-functional coating providing both immediate degreasing and long-term rust prevention without the drawbacks of traditional wax-based thickeners
2Reliability
If rust preventive additives are used alone in conventional formulations, then the initial rust prevention is provided, but the rust preventive effect is insufficient when workpieces are stored for a long period of time
Solution Approach 1:
The invention ensures continuous rust protection over extended storage periods by formulating a rust preventive oil that maintains effective coating thickness and protective properties over time, preventing the degradation or premature removal of the protective layer that plagues conventional formulations, thereby providing uninterrupted protection from initial application through long-term storage
Solution Approach 2:
The invention optimizes the concentration and type of rust preventive additives (0.1-10% by mass of sulfonate metal salts, sulfonate amine salts, carboxylic acids, esters, and amines) to achieve enhanced long-term stability and protective film durability, ensuring the coating remains effective throughout extended storage periods rather than degrading over time
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 effectively suppresses rust development on metal parts like steel sheets, bearings, and guide rails for an extended period, ensuring a high rust preventive effect even when rust-causing factors are present, as demonstrated by maintaining 0% rust development in neutral salt spray tests.
Implementation Method 1
a rust preventive oil composition including: (A) a base oil that is at least one selected from a mineral oil and a synthetic oil; (B) 0.1 to 10% by mass of water based on the total mass of the composition; and (C) one or more specific rust preventive additives selected from the group consisting of a sarcosine-type compound, a nonionic surfactant, a sulfonate salt, an ester, an amine, a carboxylic acid, a fatty acid amine salt, a carboxylate salt, paraffin wax, a salt of oxidized wax, and a boron compound
Implementation Method 2
the rust preventive oil composition has a kinetic viscosity of 20 to 100 mm2/s at 40° C
Data Source
AI summary
A rust preventive oil composition is provided, which includes: (A) a base oil that is at least one oil selected from a mineral oil and a synthetic oil; (B) 0.1 to 10% by mass of water based on a total mass of the composition; and (C) one or more specific rust preventive additives selected from the group consisting of a sarcosine-type compound, a nonionic surfactant, a sulfonate salt, an ester, an amine, a carboxylic acid, a fatty acid amine salt, a carboxylate salt, paraffin wax, a salt of oxidized wax, and a boron compound, wherein the rust preventive oil composition has a kinetic viscosity of 20 to 100 mm2/s at 40° C. The rust preventive oil composition can suppress rust development over a long period of time even when there remains a rust-causing agent, which adheres to the metal parts assembled by bare hands, such as steel sheets, bearings, steel balls, and guide rails.