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Method for determining storage alkalinity of engine coolant

A technology for engine coolant and reserve alkalinity, which is applied in chemical analysis by titration method, can solve the problems of cumbersome daily maintenance of glass electrodes and calomel electrodes, increase maintenance workload, etc., to reduce daily maintenance work, Avoid environmental pollution and health damage problems, the effect of obvious color change

Inactive Publication Date: 2016-02-03
FIRST TRACTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the daily maintenance of glass electrodes and calomel electrodes used in this standard is also relatively cumbersome, which increases the maintenance workload

Method used

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  • Method for determining storage alkalinity of engine coolant
  • Method for determining storage alkalinity of engine coolant
  • Method for determining storage alkalinity of engine coolant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] 1) Preparation of 1# coolant sample to be tested:

[0109] Pour the newly purchased cooling liquid sample for reserve alkalinity determination into a 250mL beaker, stir well with a glass rod and set aside;

[0110] 2) Preparation of 0.1mol / L hydrochloric acid standard solution:

[0111] Use a 10mL graduated cylinder to measure 9.0mL of concentrated hydrochloric acid, transfer it to a 1000mL volumetric flask, dilute it with ultrapure water to the scale of the 1000mL volumetric flask, and shake well to be labeled;

[0112] 3) Preparation of 0.1mol / L sodium hydroxide standard solution:

[0113] On an electronic balance, weigh 2.0 g of solid sodium hydroxide in a 50 mL beaker, add ultrapure water to dissolve it completely, then transfer it to a 500 mL volumetric flask, then dilute to the scale of the 500 mL volumetric flask with the same ultrapure water, shake evenly waiting for the mark;

[0114] 4) Preparation of indicator solution:

[0115] In the process of measurin...

Embodiment 2

[0155] For the determination of the reserve alkalinity in the 2# cooling liquid sample to be tested, the detection steps are consistent with steps 1) to 8) in Example 1. Among them, the detection data of the alkalinity content of the 2# cooling liquid samples to be tested are shown in Table 2.

[0156] Table 22# test cooling liquid sample storage alkalinity measurement data

[0157]

[0158]

Embodiment 3

[0160] For the determination of the reserve alkalinity in the 3# cooling liquid sample to be tested, the detection steps are consistent with steps 1) to 8) in Example 1. Among them, the detection data of the alkalinity content of the 3# cooling liquid sample reserve is shown in Table 3.

[0161] Table 33# test cooling liquid sample storage alkalinity measurement data

[0162]

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Abstract

The invention discloses a method for determining the storage alkalinity of engine coolant, and belongs to the technical field of non-metallic material analysis and detection. The method relates to a reagent, an instrument and a specific determination method. The reagent includes concentrated hydrochloric acid, phenolphthalein, ethyl alcohol of 95%, absolute ethyl alcohol, sodium hydroxide, ultrapure water, potassium biphthalate and methyl red. The instrument comprises an oven, an electronic scale, an alkali burette, an acid burette, a dryer, a transfer pipette, a measuring cylinder, a beaker, a volumetric flask, a conical flask, a glass rod and a dropping bottle. According to the method, potential healthy and environmental harm caused by using a calomel electrode can be avoided, tedious daily maintenance work to the electrode can be avoided as well, the errors of the determination result and the detecting instrument determination result are small, the detection requirement for the storage alkalinity content of the engine coolant can be met, and simpleness and quickness are achieved.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection of non-metallic materials, in particular to a method for measuring the reserve alkalinity in engine coolant. Background technique [0002] Coolant is an indispensable part of tractor and other motor vehicle engines. It circulates in the tractor engine cooling system to keep the engine running at normal operating temperature. Most of the engine coolants currently on the market are glycol-based. During use, the acidic products and acid gases produced by the thermal oxidation cracking of ethylene glycol and other glycols in the cooling liquid enter the cooling liquid, which will make the pH value of the cooling liquid decrease continuously, and even become acidic. In severe cases, it will cause engine damage. The corrosion of metal materials in the cooling system causes the engine to fail to work normally. In order to maintain the pH value of the cooling liquid in the normal range an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
Inventor 张冰冰刘新杰周在立邵经峰曹晨史小阳张延午闫立峰
Owner FIRST TRACTOR
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