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Vapor phase corrosion inhibition

A corrosive, azole compound technology, used in additives, lubricating compositions, petroleum industry, etc., can solve problems such as unprotected electronic devices

Active Publication Date: 2021-02-26
THE LUBRIZOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since such electronics are usually not submerged in lubricants, these electronics are not protected

Method used

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  • Vapor phase corrosion inhibition
  • Vapor phase corrosion inhibition
  • Vapor phase corrosion inhibition

Examples

Experimental program
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Effect test

example

[0079] Sample Preparation - General procedure for coupling azoles to alkylamines using paraformaldehyde: combine 1.0 moles of azole with 1.0 moles of alkylamine or dialkylamine and heat the mixture to 60- 80°C. Then 0.94 to 1.0 equivalents of paraformaldehyde were added. For low mw amines, the paraformaldehyde charge is divided into two equal parts and the second part is not charged until the reaction exotherm from the first charge subsides. The equivalent weight of paraformaldehyde is calculated as follows:

[0080] Eq wt=30.0264 / (CH in paraformaldehyde 2 =wt% of O)

[0081] Once the exotherm from the paraformaldehyde addition had subsided, heating was continued until all solids had dissolved. Vacuum was then applied to the reaction mixture to remove water, a by-product of the reaction. No further purification of the product was required. Samples prepared by this method are provided below.

[0082] Sample 1: A commercial sample of 1,2,4-triazole was obtained from Tokyo...

example 1

[0106] Example 1: Several sample corrosion inhibitors were incorporated at a level of 500 ppm into Formulation A without tolyltriazole (listed as "Baseline" in Table 1). The semi-submersion test was performed on each of these fluids at 65°C for seven days. The ASTM D130 ratings for both the liquid space portion and the vapor space portion of each coupon are shown in Table 1 below.

[0107] Table 1

[0108]

example 2

[0109] Example 2: The performance of three sample corrosion inhibitors in the semi-submersion test as a function of the treatment level of Formulation A without tolyltriazole is shown in Table 2. The semi-submersion test was performed at 80°C for seven days. ASTM D130 ratings are listed for both liquid and vapor spaces (front only).

[0110] Table 2

[0111]

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Abstract

A disclosed technology relates to inhibiting corrosion of conductive element portions that are subjected to the action of a lubricant composition but not immersed in the lubricant composition, or in other words, inhibiting vapor phase corrosion. The technology more specifically relates to the use of azole compounds that are capable of inhibiting corrosion of the conductive element portion in the vapour space above the lubricant composition and often in the liquid phase of the lubricant composition.

Description

Background technique [0001] The disclosed technology relates to inhibiting corrosion of portions of electrically conductive components that are subjected to the action of, but not immersed in, an automotive lubricant composition, or in other words, inhibiting Steam Vapor phase corrosion. This technology relates more particularly to the use of azole compounds capable of inhibiting the corrosion of parts of said conductive elements in the vapor space above an automotive lubricant composition and often in the liquid phase of said lubricant composition. [0002] Corrosion is becoming increasingly relevant in the automotive industry due to the electrification of vehicle drivetrains in fully electric vehicles, hybrid vehicles or even internal combustion engine vehicles. Although transmission lubricants are designed to protect metal (most commonly copper or iron) surfaces submerged in oil from corrosion, some lubricants can still be corrosive. Further, problems arise due to corrosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M133/44C10M141/08
CPCC10M133/44C10M141/08C10M2215/223C10M2215/224C10M2219/022C10M2219/08C10M2219/106C10M2223/049C10M2215/042C10M2215/28C10M2219/046C10M2215/06C10M2209/084C10N2030/12C10N2040/042C10N2040/044C10N2040/04C10N2040/045C10N2040/046C10N2040/14C10N2050/06C10M169/04C10M2203/003C10M2215/30
Inventor M·J·麦克吉尼斯S·D·埃文斯P·米亚特M·P·加黑甘G·亨特郭斌斌
Owner THE LUBRIZOL CORP
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