High-temperature molten salt corrosion is the primary harsh environmental factor leading to structural damage and functional failure of salt bath furnace temperature measuring equipment in industrial production. Most industrial medium and high-temperature salt bath furnaces use barium chloride (BaCl2) as the core heating and heat preservation medium. At a high temperature range of 1000℃ to 1350℃, molten barium chloride presents extremely strong chemical activity, with powerful molecular penetration and electrochemical corrosion capabilities. It can cause severe chemical erosion, structural dissolution and internal penetration damage to ordinary metal and ceramic temperature measuring components in a short time, resulting in rapid tube wall thinning, perforation and core wire damage. Our salt bath furnace thermocouples are professionally and pertinently optimized for BaCl2 molten salt working conditions, with industry-leading ultra-strong molten salt corrosion resistance.
The excellent anti-corrosion performance of the product fundamentally comes from the high-purity MCPT-4 metal ceramic outer protection tube, which is the first-line anti-corrosion barrier of the entire thermocouple equipment. This special customized metal ceramic material has ultra-high chemical inertness, and will not produce any chemical reaction, dissolution phenomenon and corrosion failure when immersed in high-temperature BaCl2 molten salt for a long time. Its ultra-dense microscopic sintered structure can completely block the penetration and diffusion of molten salt active molecules, effectively prevent corrosive media from invading the inner corundum protection tube and internal thermocouple core wire, and fundamentally isolate the molten salt corrosion damage to the overall equipment structure.
Verified by strict professional industrial technical tests and long-term on-site operation data, our salt bath furnace thermocouples can achieve more than 1400 hours of stable continuous operation in a high-temperature molten salt environment of 1280℃ BaCl2, with no structural corrosion damage and no attenuation of temperature measurement performance. This ultra-long continuous service life is far higher than that of ordinary industrial thermocouples on the market, which can only maintain stable operation for hundreds of hours in the same harsh environment. It fully reflects the excellent molten salt corrosion resistance and environmental adaptability of the product, perfectly meets the needs of long-term uninterrupted continuous batch production of industrial salt bath furnaces, and avoids frequent production shutdowns and equipment replacement losses caused by component corrosion failure.
In actual industrial heat treatment production, molten salt corrosion damage will not only destroy the physical structure of the thermocouple, but also directly cause serious temperature measurement deviation. After the ordinary protection tube is corroded and thinned unevenly, the overall heat conduction efficiency and thermal uniformity will change significantly. The temperature induction data of the thermocouple cannot accurately reflect the real furnace temperature, resulting in inconsistent heat treatment temperature of metal workpieces, and further causing quality problems such as unqualified workpiece hardness and poor structural stability. The stable anti-corrosion performance of our products ensures that the structural state, tube wall thickness and heat conduction performance of the protection tube remain unchanged for a long time, and the temperature measurement data is always accurate, stable and consistent.
Aiming at the common medium-temperature molten salt working conditions in the machinery manufacturing industry, the product has carried out targeted material ratio optimization and structural upgrading, with extremely strong working condition adaptability. Whether it is 24-hour continuous high-temperature immersion operation or intermittent cyclic production with frequent startup and shutdown, it can maintain stable anti-corrosion performance and accurate temperature measurement effect. It is a professional anti-molten salt corrosion temperature measuring solution specially built for industrial salt bath furnace scenarios, thoroughly solving the long-standing industry pain points of easy corrosion, short service life and unstable measurement of traditional salt bath thermocouples.
The core anti-corrosion performance of the product comes from the high-purity MCPT-4 metal ceramic outer protection tube. This special metal ceramic material has ultra-high chemical inertness, and will not undergo chemical reaction, dissolution and corrosion with high-temperature BaCl2 molten salt. Its dense microscopic structure can completely block the penetration of molten salt molecules, prevent corrosive media from invading the inner protection tube and internal thermocouple core, and fundamentally isolate the corrosion damage of molten salt to the equipment structure.
Verified by professional industrial technical indicators, the service life of our salt bath furnace thermocouples in a 1280℃ BaCl2 molten salt environment is more than 1400 hours of continuous operation. This ultra-long continuous service life is far higher than that of ordinary industrial thermocouples, which can only work for hundreds of hours in the same environment. It fully reflects the excellent molten salt corrosion resistance of the product, meets the needs of long-term uninterrupted continuous production of industrial salt bath furnaces, and avoids frequent shutdown and replacement of equipment caused by component corrosion failure.
In actual industrial production, molten salt corrosion not only damages the equipment structure, but also causes temperature measurement deviation. After the ordinary protection tube is corroded and thinned, the heat conduction efficiency changes, and the thermocouple induction temperature cannot accurately reflect the real furnace temperature, resulting in unqualified heat treatment workpiece quality. The stable anti-corrosion performance of our products ensures that the structural state and heat conduction performance of the protection tube remain unchanged for a long time, and the temperature measurement data is always accurate and stable.
Aiming at the medium-temperature molten salt working conditions commonly used in the machinery industry, the product has carried out targeted material ratio and structural optimization, with strong working condition adaptability. Whether it is continuous high-temperature immersion or intermittent cyclic operation, it can maintain stable anti-corrosion performance. It is a professional anti-molten salt corrosion temperature measuring solution specially built for industrial salt bath furnace scenarios, solving the long-standing industry pain point of easy corrosion and short life of salt bath thermocouples.
