I would like to ask what types of corrosion inhibitors and biocides are suitable for use in the cooling water systems of central air conditioning systems

It is recommended to use quaternary ammonium salts and isothiazolinones as fungicides, at a concentration of 20-50PPM, applied once a week. These should be used alternately to prevent the development of resistance. Corrosion inhibitors can be some commercial compound formulations

Our company specializes in the use of corrosion and scale inhibition agents for central air conditioning cooling water and chilled water. We offer high-quality corrosion and scale inhibitors, as well as biocides and algaecides. If you are interested, please contact me at 13661034460; my surname is Yang, and our company is located in Beijing

Soft water is more corrosive, but equipment is not easily corroded by it. Find a water treatment manufacturer to buy some chemicals; the better ones will also provide you with technical support.

We once used demineralized water to top up the water in the evaporative water cooler, without adding any chemicals; as a result, the heat exchange tubes corroded within just one year. The tubes were galvanized, and all the zinc peeled off. I think using tap water might be better – what do you all think?

It’s great that the make-up water is soft water and corrosion inhibition treatment has been applied! A slow-release agent needs to be added! In central air conditioning systems, the main units and fan-coil units are made of copper; therefore, agents designed to protect copper are used. Such as adding MBT, BTA, TTA, etc., to other agents! The fungicide uses non-oxidizing quaternary ammonium salts, isothiophosphonate, and copper salts (copper oxide) ； Alternating sterilization with oxidizing disinfectants such as chlorine dioxide and ozone!

Our company has introduced a new German product – the Merus water treatment ring. This product can act on the scale and rust in the pipes, preventing them from sticking together. And it can prevent the formation of rust and scale. Compared to similar products, it offers better energy savings, environmental protection, water conservation, algae suppression, and sterilization capabilities. Suitable for use in hotels, guesthouses, spa centers, central air conditioning systems, and industrial circulating water cooling applications. Customers such as Tsinghua University, Ansteel Group, Liaohe Oilfield, and Anbang Chemical Group have already installed it in use, and it demonstrates significant effects in rust prevention, scale removal, sterilization, and algae control, meeting the design requirements. For more details, please visit www.mildness.com.cn. We are currently seeking agents across the country. Contact person: Mr. Zhao Mobile phone: 13810677791 Phone number: 010-60537525 E-Mail: zhaojz2008@sina.com

New German product – Merus water treatment ring. This product can act on the scale and rust in the pipes, preventing them from sticking together. And it can prevent the formation of rust and scale. Compared to similar products, it offers better energy savings, environmental protection, water conservation, algae suppression, and sterilization capabilities. Suitable for use in hotels, guesthouses, spa centers, central air conditioning systems, and industrial circulating water cooling applications. Customers such as Tsinghua University, Ansteel Group, Liaohe Oilfield, and Anbang Chemical Group have already installed it in use, and it demonstrates significant effects in preventing rust, removing scale, sterilizing, and killing algae, meeting the design requirements. For more details, please visit www.mildness.com.cn

Contact several chemical manufacturers and ask them to provide you with dosage plans for the chemicals. After comparison, select a medication with an appropriate cost-performance ratio for use.