Cleaning method for chain sling:
Stainless steel chain in the storage and use of the process of wrong, the appearance of some dirt. The cleaning of the stainless steel chain sling is very important. Several methods are introduced for users to choose and use:
Manufacturing is often carried out in dusty locations, which often carry a lot of dust, which constantly falls on the surface of the equipment. They can be removed with water or alkaline solution. However, the adhesive fouling requires high pressure water or steam finishing.
2, float iron or embedded iron
On any surface, free iron rusts and causes corrosion of the stainless steel. Therefore, it is necessary to eradicate. Float powder can usually be removed with dust. Some adhesion is very strong, it is necessary to press the embedded iron processing. In addition to dust, the appearance of the origin of many iron, including carbon steel wire brush and finishing with usually used in carbon steel, low alloy steel or cast iron used sand, glass beads or other abrasive blasting, or when it comes to front in the vicinity of the stainless steel parts and equipment of non grinding stainless steel products. In the course of blanking or lifting, if the stainless steel is not taken protective measures, the iron on the wire rope, sling and work table is easy to embed or smear the surface.
The ordering request and post fabrication view can avoid and detect the presence of free iron. The ASTM specification A380 specifies the rust test method for looking at stainless steel, iron or steel particles. This method shall be applied when the request cannot exist. If the result is satisfactory, wash the surface with clean pure water or nitric acid until dark blue is completely absent.
As the specification points out, if the rust test solution can not completely eradicate the clean, it is not recommended in the technical appearance of the equipment, that is used to produce direct contact with human consumption products, the appearance of this experimental approach. The simple way is exposed for 12~24 hours in the water, check if there is rust. This experiment is of poor sensitivity and time consuming. These are checks, experiments, not arrangements. If the presence of iron is found, it is necessary to use the chemical and electrochemical methods described later.