Salt Deterioration Ceramic

Ceramics glass and stone objects do not deteriorate rapidly from submersion in seawater.

Salt deterioration ceramic. Over time it can cause a gradual loss of the original performance of bricks. Signs of salt damage are white crystals on the surface shallow pits on the ceramic body or missing spots of glaze figure 1. These salts dissolve and re crystallize as the humidity fluctuates from high to low causing the ceramic structure to be crushed and glazes can flake off and surfaces spall. Damage from salt contamination may occur in unwashed objects recovered from buried or underwater sites.

Ceramics can take the form of pottery utilitarian vessels sculpture casting cores for bronzes or architectural elements such as tiles pipes and bricks. Ceramic fired in high temperatures may also be susceptible to water if their mineral particles are soluble in water for example gypsum or calcite. Identifying the early stages of deterioration can be difficult so treat. This application of heat causes irreversible changes in within the clay body rendering the form permanent.

This process is related to inter alia the accumulation of salt originating from the external environment in ceramic texture. There are various ceramic deterioration patterns by soluble salts. Therefore it needs to select the desalination method of ceramics from shipwreck considering the material characteristics and. This chapter discusses the deterioration of ceramics glass and stone.

Ceramics are found in varying states of preservation on a wreck site. For example in forming a salt glaze salt sodium chloride is added to the kiln as the ceramic is fired. There are a great variety of clays in the world used since prehistoric times to make everything from utilitarian and ceremonial objects to decorative friezes small figurines and large scale sculpture. The term ceramic covers a wide range of materials and objects.

The long life of bricks in different conditions especially in the presence of moisture promotes progressive changes in ceramic material. Careless or uninformed cleaning of food stains grease and dirt can cause physical deterioration of ceramic and glass pieces. Ceramics are objects made from clay or clay mixed with other materials that are subjected to high heat. Typically this activity of conservation restoration is undertaken by a conservator restorer especially when dealing with an object of cultural heritage ceramics are created from a production of coatings of inorganic.

The salt vaporizes at a high temperature and the sodium combines with the silica in the ceramic body forming a characteristic thin orange peel textured glaze. Conservation and restoration of ceramic objects is a process dedicated to the preservation and protection of objects of historical and personal value made from ceramic. Art conservation and restoration art conservation and restoration ceramics.