Hiwin HG Series Linear Rails

After the micro linear guide rail was corroded, s was found in the micro pits of the oil stains and the corroded groove. After being briefly cleaned with "ethanol+ultrasonic", the residual s content in the groove micro pits was almost twice that of the oil stains. One possible explanation is that the anti-wear agent s of the guide rail oil easily adsorbs water molecules in the air and hydrolyzes, becoming acidic. Due to its higher specific gravity than oil, it will deposit at the bottom of the groove and be bound to the rough micro pit surface, exacerbating surface corrosion. The evaporation of water in cutting fluid is also an important source of water molecules in the air. S is commonly present in micro pits in the form of sulfates such as potassium sulfate and calcium sulfate.

A small amount of metal shavings adhered to the slider can be scraped off from the surface of the track, and a large amount of metal shavings come from chip pollution generated during metal processing. Metal chips are coated with cutting fluid, and when the cutting fluid mixes with guide rail oil, it forms an oil-water mixture, known as sludge. On the other hand, anti rust components such as alkali in cutting fluid are easily adsorbed by oil, and the remaining water, because heavier than oil, sinks to the bottom of the groove and is more likely to bind to damaged surfaces, accelerating the corrosion of the guide rail surface.

Corrosion first occurs in the damaged micro pits, and then extends to the pit bottom and walls, with the corroded area continuously expanding. The rust liquid spreads and mixes with oil, contaminating the oil and reducing the rust prevention ability of the area affected by the rust liquid.

HG Series,Linear Rails