Vernier callipers are used to check the width & height on Rectangular Hollow Section (RHS), Square Hollow Section (SHS) & Circular Hollow Section (CHS) product. They are also used to measure the inside (bore) diameter when a nominal bore is required.

There are various methods to remove white rust and repair damage, depending on the severity of the oxide coating.

Often early onset staining can be removed or significantly reduced by wiping with a little Kerosene, or vinegar then rinsing with water and drying.

Info Sheet – What is WHITE RUST

White rust is a naturally forming white deposit that develops on galvanized steel due to corrosion process.

Zinc products are susceptible if the surfaces become and stay wet while in a pack or bundle. Capillary action pulls water into the space between tubes where the absence of airflow contributes to the accelerated formation of naturally forming corrosion products.

White rust is most commonly encountered during transport and storage when material becomes wet and the trapped moisture between touching surfaces is unable to escape and is also referred to as ‘wet storage stain’.