Lubricating Oil Rust Inhibition via Polar Substance Counteraction
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Solution Overview
Problem
Lubricating oil compositions used in equipment contaminated with water or steam often fail to provide sufficient rust inhibiting capability due to the presence of polar substances in certain base oils, even when blended with known rust inhibitors like sarcosine derivatives and alkenylsuccinates.
Innovation Solution
A lubricating oil composition containing a base oil with specific gas chromatographic characteristics and a combination of rust inhibitors such as succinates, sorbitan fatty acid esters, carboxylic acid amides, neutral alkyl phosphates, and fatty acid-primary amine combinations, which are blended in specific mass percentages to enhance rust inhibiting capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a base oil containing polar substances is used to diversify raw material procurement, then the variety of base oils increases, but the rust inhibiting capability deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the rust inhibitor package by introducing a specific combination of carboxylic acid amide (0.01-0.5 mass%) and neutral alkyl phosphate (0.005-0.05 mass%), which effectively counteracts the rust-promoting effects of polar substances in diversified base oils while maintaining procurement flexibility
Solution Approach 2:
The patent creates a composite rust protection system by combining multiple rust inhibitors (carboxylic acid amide, neutral alkyl phosphate, and optionally sarcosine derivative and/or alkenylsuccinate) in specific proportions, forming a synergistic mixture that effectively handles base oils with polar substances
2Device complexity
If ordinary rust inhibitors (sarcosine derivative and alkenylsuccinate) are blended with base oils containing polar substances, then the rust inhibitor combination is simple, but the rust inhibiting capability is insufficient
Solution Approach 1:
The patent modifies the rust inhibitor formulation by adding carboxylic acid amide and neutral alkyl phosphate with specific concentration ranges, changing the chemical parameters to achieve effective rust inhibition against polar substance-containing base oils
Solution Approach 2:
The carboxylic acid amide and neutral alkyl phosphate act as intermediary substances that mediate between the base oil and metal surfaces, forming protective films that prevent rust even in the presence of polar substances that would otherwise promote corrosion
Data Source
AI summary
A lubricating oil composition contains a base oil and a rust inhibitor, in which the base oil has a gas chromatogram measured by gas chromatography satisfying the particular condition (α), and the rust inhibitor is at least one selected from a first rust inhibitor, a second rust inhibitor, a third rust inhibitor, and a fourth rust inhibitor, and satisfies the particular condition (β).