PH acid-base tester

With the vigorous development of the national economy, the path of industrial development at the expense of the environment is unsustainable, and the government has also strengthened environmental protection requirements and monitoring. This involves many parameters that need to be tested, such as acid-base PH, dissolved oxygen, ORP, etc. Today, the editor will share with you about the PH tester. PH meter is divided into experimental type and online type, so today it is expanded on the application of online pH meter and electrophoresis bath.　　 Before starting, we first need to understand what is pH? pH is a value that measures the pH of an aqueous solution, also known as hydrogen ion concentration index, acid-base value, and is a scale of hydrogen ion concentration in a solution. A pH value of 7 is neutral, and a value less than 7 is acidic. The smaller the value, the stronger the acidity; the value greater than 7 is alkaline, and the larger the value, the stronger the alkalinity.　　On-line: On-line pH tester is a highly intelligent on-line continuous monitor, which consists of two parts: sensor and secondary meter. It can be equipped with three-composite or two-composite electrodes to meet various applications. Equipped with pure water and ultrapure water electrodes, it is suitable for pH measurement of water with conductivity less than 3μs/cm (such as chemical feed water, saturated steam, condensed water, etc.). Application: During the electrophoretic coating production of electrophoresis bath, free acid will be generated on the surface of the anode steel plate (tube), and the amount of acid will gradually accumulate as the production progresses. If it is not controlled, the pH value of the electrophoresis bath will gradually decrease. . So, how should we realize the stable pH control of the electrophoresis bath? 　　 Cathodic electrophoretic paint is a water-soluble paint formed by neutralizing amino-based resin with organic acid. Therefore, the cathodic electrophoretic paint is acidic, or weakly acidic. The pH value is a very important parameter to control the stability of the bath. Each electrophoretic paint has some differences in the management of the pH value of the bath, especially the pH value of the single-component cathodic electrophoretic paint is generally relatively low, and the two-component cathodic electrophoresis The paint is higher.　　 The pH value is higher than the index, indicating that the amount of acid that provides solubilization in the bath is reduced, which will cause the hydrophilicity of the electrophoretic paint resin to decrease, and the stability of the bath will also decrease. The higher the pH, the more serious this trend will be. In severe cases, the electrophoresis tank will produce insoluble particles! Flocculation, stratification, precipitation, and even the entire tank will be scrapped! This will also lead to the clogging of filtration, ultrafiltration and other equipment! The same, more direct Affect the quality of the electrophoretic paint film, such as: the appearance of the paint film becomes worse! The paint film is easy to break down and blisters and other abnormalities! The most serious is that it is impossible to carry out electrophoretic coating production at all, resulting in significant economic losses! The pH value is lower than the index, and the solubility of the resin is enhanced, which is beneficial to the stability of the electrophoresis bath. But we all know that everything has two sides, too low pH value electrophoresis wet paint film is prone to redissolution, the thickness of the paint film decreases, and even roughness, pinholes, pockmarks, etc. appear! At the same time, the Coulomb efficiency will also decrease (the Coulomb efficiency is An indicator to measure the power consumption performance of electrophoretic paint, the higher the Coulomb efficiency, the lower the power consumption), and the more corrosive to the equipment. Then the PH/ORP tester is one of the intelligent online chemical analysis instruments, which is widely used in the PH value or ORP value and temperature of solutions such as thermal power, chemical fertilizers, metallurgy, environmental protection, pharmaceuticals, biochemistry, food and tap water. Continuous monitoring. This controller can be used in conjunction with various electrodes. Key parameters and specifications of the acid-base tester: 　　 1. Confirm the use occasion and medium 2. Measure the temperature of the medium 3. Corrosive 4. The specific city of the medium 5. Installation method 6. Corresponding controller output signal and functional application aspects: Generally in medium and large sewage treatment plants, in the 1990s, some foreign imported brands, such as E+H, Mettler, Hash, etc., were mainly used. With the improvement of domestic industrial water products, some domestic manufacturers Also gradually entered this market. For example, Kaidi has done a good job in environmental protection and has one-stop service, which has been recognized by a large number of customers and peers.
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