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Method for testing aging degree of transformer oil

A technology of aging degree and test method, applied in the direction of using chemical indicators for analysis, using titration method for chemical analysis, etc., can solve problems such as strong irritation, high toxicity of benzene, changes in the hematopoietic system of benzene, and achieves convenient and consistent operation. Low toxicity and toxicity

Inactive Publication Date: 2012-11-14
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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Problems solved by technology

This method adopts ethanol-benzene (1+1) mixed solution as solvent when measuring acid value, because benzene has greater toxicity and strong irritant, seriously affects the laboratory environment and the health of analysts, and long-term use of benzene will Chronic poisoning symptoms such as neurasthenia and hematopoietic system changes in operators

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  • Method for testing aging degree of transformer oil

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Embodiment Construction

[0023] A method for testing the aging degree of transformer oil, which comprises the following steps:

[0024] 1).Oil sample test

[0025] Accurately weigh 5.0-10.0g of the aged test oil, add 50ml of ethanol-petroleum ether mixture, shake well, then add 0.5ml of basic blue 6B indicator, and titrate with 0.05mol / L KOH ethanol solution until the color of the mixed solution is until it becomes light red;

[0026] 2).Blank solvent test

[0027] Measure 50ml of ethanol-petroleum ether mixture, and perform blank measurement according to the same operation as above;

[0028] 3). Calculation

[0029] 3. The formula for calculating the acid value of test oil after aging is as follows:

[0030] c(mgKOH / g)=(V-V1)*C1*56.1 / m

[0031] in

[0032] c: acid value, mgKOH / g

[0033] V: Volume of 0.05mol / L potassium hydroxide ethanol solution sample consumed when titrating test oil, ml

[0034] V1: When titrating the blank solution, the volume of 0.05mol / L potassium hydroxide ethanol solu...

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Abstract

The invention relates to industrial oil detection, in particular to a method for testing transformer oil. The method for testing the aging degree of the transformer oil comprises the following steps: 1) an oil sample test: accurately weighing 5.0 to 10.0g of aged test oil, adding 50ml of mixed solution of ethanol-petroleum ether, sufficiently and uniformly shaking, adding 0.5ml of alkali blue B indicator, and dripping KOH ethanol solution of which the concentration is 0.05mol / L until the color of the mixed solution is turned into light red; 2) a blank solvent test; and 3) calculation. In the method, benzene serving as solvent is abandoned, so the toxicity of the aging test is reduced, and the operation is simple and convenient.

Description

technical field [0001] The invention relates to industrial oil product testing, in particular to a testing method for transformer oil. Background technique [0002] When the oil filling of the transformer equipment is insufficient and new oil needs to be added, it is best to add new oil of the same brand. The various characteristic indexes of supplemented oil products should not be lower than the oil in the equipment. If the amount of new oil added is small, such as less than 5%, usually there will be no problem; if the amount of new oil added is large, especially when a large amount of new oil is added until it has been seriously aged and is close to the quality of the operating oil When the oil is in the lower limit of the standard, it may lead to rapid precipitation of sludge in the oil; when different brands of operating oil must be used in combination, due to the composition of the oil and the types of additives contained in it, the mixed use may undergo chemical chang...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/16G01N31/22
Inventor 孟莹
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE