The Surface Treatment Of Newly Made Anchor Chains Can Be Carried Out By Shot Blasting Or Chemical Acid Washing

The anchor chains, anchors, and anchor chain compartments of ships are often subject to friction and seawater erosion, which can lead to severe rusting. Therefore, coatings are required to have wear-resistant, seawater resistant, and rust resistant properties. The commonly used coating is coal tar clear varnish, usually applied 2-3 times, with a dry film thickness of over 60 μ m. In the use of ships, it is required to repair the paint film in a timely manner if it falls off due to collision or other reasons. In a dry environment, use sandpaper to polish the edges of the old paint film, remove dust and dirt, and carefully apply the asphalt coating to the anchor chain by brushing. After 24 hours, apply the second coat, and only use it after 5 days. During this period, do not drag or stack anchor chains that are not completely dry.
The surface treatment of newly made anchor chains can be carried out by shot blasting or chemical acid washing. Many shipyards use rolling method for rust removal, tying anchor chains with iron wire into a speed shape of about 3m long, and placing them in a drum. Steel wire forging, steel grit, iron fragments, etc. are placed in the drum, and an electric motor is used to drive the drum to rotate. The anchor chains are then subjected to abrasive impact to remove rust. Remove the rust dust inside the cylinder and on the anchor chain before painting. Generally, it can be lifted into a paint dipping cylinder for dipping and coating construction. After 3-5 minutes, it can be lifted and dried. The shortest coating interval is 24 hours, usually with 3 coats of immersion coating.