Determination of the corrosion degree of engine coolant and related instructions

The degree of corrosion is a key indicator for measuring the ability of engine coolant to damage metal parts. During long-term circulation, engine coolant will come into contact with metals such as steel, copper and aluminum in the cooling system. If the anti-corrosion performance of the coolant is insufficient, it will cause metal rust and corrosion, which in turn will affect the heat dissipation efficiency of the cooling system. In severe cases, it may even cause component leakage and malfunction, shortening the service life of the engine. Therefore, it is necessary to measure the degree of corrosion of the coolant on the metal through professional equipment to provide a basis for the quality assessment and use of the coolant.

The corrosive impact of engine coolant is mainly related to the metal material and the usage environment. The corrosion resistance of different metals in coolant varies. For instance, commonly used cooling system metals such as 20# steel, brass, and copper have a significantly increased risk of corrosion under high-temperature and oxygen-exposed conditions. When the coolant is in a high-temperature environment (such as close to 100℃), its chemical activity increases, the reaction rate with metals accelerates, and at the same time, oxygen in the air diffuses into the coolant, which also intensifies oxidation corrosion. In addition, factors such as metal impurities and water quality within the cooling system may also indirectly promote corrosion reactions, leading to rusting and weight loss of metal test pieces.

The SH0085B Engine coolant corrosion Tester is a professional device designed and manufactured in accordance with the standards of the petrochemical industry of the People's Republic of China and ASTM D1384 "Test Methods for Engine Coolant Corrosion". It is suitable for determining the corrosion degree of high-boiling-point and low-boiling-point engine coolant and concentrate on typical metal test pieces, providing data support for the quality inspection, research and development, and use and maintenance of coolant products.

This instrument features multiple core functions and technical advantages:

It adopts a metal bath heating method, with a temperature control range covering room temperature to 100℃, and a temperature control accuracy of ±0.1℃, which can precisely simulate the high-temperature working environment of coolant in the engine.

It is equipped with a silent air compressor, eliminating the need for manual gas mixing. The gas flow rate can be adjusted to 100ml/min±10ml/min by the flowmeter, meeting the requirements of ASTM D1384 standard for the gas environment.

It supports conducting three groups of experiments simultaneously. It is equipped with a transparent observation window and heat-resistant glass components (such as a 1000ml high-neckless beaker and a sand core glass gas diffuser), allowing for real-time observation of the experimental status and ensuring the intuitness of the experimental process and the accuracy of the data.

The overall power of the instrument is 2.5kW, with a standby power consumption of no more than 2000W. It is also equipped with a wide-range timer from 0 to 9999 hours, which can meet the corrosion testing requirements of different durations.

During the test, metal test pieces that meet the standards should be used, including 20# steel sheets, brass sheets, copper sheets of 50x20x2mm, as well as cast aluminum sheets, solder sheets, and cast iron sheets of 50x25x3.5mm (all with a single center hole of φ7.0mm), and auxiliary accessories such as brass washers, insulating washers, and steel washers should be used to ensure full contact between the test pieces and the coolant. Ensure the reliability of the test results.