In the field of precision measurement, optical measuring instruments for shafts play a crucial role in ensuring the dimensional and shape accuracy of shaft parts. The stability and corrosion resistance of their bases in humid environments directly affect the accuracy of measurement results and the service life of the equipment. Facing complex environments with high humidity such as industrial workshops and coastal areas, granite bases, with their unique material properties and anti-corrosion advantages, have become the ideal choice for optical measuring instruments for shafts.
The challenges of damp environments to the base of measuring instruments
A humid environment is a major problem faced by the base of shaft optical measuring instruments. The moisture in the air will not only condense on the surface of the base to form a water film, but also may penetrate into the interior of the material. For metal bases, such as cast iron or steel bases, a humid environment can easily cause oxidation and rusting, leading to corrosion and peeling of the base surface, which in turn affects the installation accuracy and stability of the measuring instrument. Meanwhile, the rust produced by rusting may also enter the precision components of the measuring instrument, causing wear and jamming of the components, which seriously affects the measurement accuracy and the normal operation of the equipment. In addition, the thermal expansion and contraction effect caused by humidity changes can lead to minor changes in the size of the base, causing the measurement reference to shift and resulting in measurement errors that cannot be ignored.
The natural anti-corrosion property of granite
Granite, as a kind of natural stone, has an inherent advantage of anti-corrosion. The internal mineral crystals are closely crystallized and the structure is dense and uniform, forming a natural protective barrier that greatly hinders the penetration of water. Unlike metallic materials, granite does not undergo chemical reactions with common acidic or alkaline substances. Even if it is exposed to a humid environment containing corrosive gases or liquids for a long time, it can maintain stable chemical properties and will not experience problems such as corrosion or rusting.
In mechanical manufacturing enterprises in coastal areas, the air humidity in the workshops is consistently high throughout the year and contains a certain amount of salt. The optical measuring instrument for shafts with cast iron bases will show obvious rusting phenomena in just a few months, and the measurement error will keep increasing. The measuring instrument with a granite base has remained as smooth and new as ever after several years of use, and its measurement accuracy has always been stable, fully demonstrating the outstanding anti-corrosion performance of granite in a humid environment.
The comprehensive performance advantages of granite bases
In addition to its excellent corrosion resistance, the granite base also has many other advantages, providing comprehensive protection for the stable operation of the shaft optical measuring instrument in a humid environment. The coefficient of thermal expansion of granite is extremely low, only 5-7 ×10⁻⁶/℃. Under temperature fluctuations caused by humidity changes, it hardly undergoes dimensional deformation, ensuring the long-term stability of the measurement reference. Meanwhile, the excellent vibration damping characteristics of granite can effectively absorb external vibrations. Even if the equipment experiences slight resonance due to the influence of water vapor in a humid environment, the vibration can be rapidly attenuated, avoiding interference with measurement accuracy.
In addition, after ultra-precision processing, the granite base can achieve extremely high flatness, providing a reliable reference for high-precision measurement of shaft parts. Its high hardness characteristic (Mohs hardness of 6-7) makes the base surface have excellent wear resistance. Even with frequent use in a humid environment, it is less likely to wear out, further extending the service life of the measuring instrument.
In the field of optical measurement of shafts with extremely high precision requirements, the corrosion and stability issues caused by humid environments cannot be ignored. Granite bases, with their natural anti-corrosion properties, stable physical performance and outstanding comprehensive advantages, have become the ultimate solution to these problems. Choosing an optical measuring instrument for shafts with a granite base can ensure continuous and stable operation in a humid environment, output accurate and reliable measurement data, and safeguard the high-quality development of industries such as mechanical manufacturing and aerospace.
Post time: May-13-2025