Low melting point alloys, such as pewter or lead-tin, are at risk of damage due to fire, though other metals are not at risk from the fire itself, but the pollutants caused by smoke.Ĭontact with water, or a complete immersion in water, will lead to some degree of corrosion. Physical force is one of the most common means of damage to metal objects, which “are considered to be strong and resilient though exhibit weakness and brittleness under certain conditions.” This includes breakage, dents, and scratches which occur in accidents, improper storage and mounting, mishandling, and over-polishing. In case of salty and sweet water finds essential are amount of gases dissolved in water, depth of water, direction of currents, and microscopic and macroscopic living organisms.Īgents of Deterioration Physical Force Amount of gases, humidity, depth and composition of soil are very important. With inorganic materials are these processes considerably longer and more complex.
Organic materials usually fail in a relatively short period of time, primarily due to biodegradation. Deterioration of materials associated with metalsĪssociated materials deteriorate depending on the origin whether they are organic or inorganic materials. In cases of marine or fresh water finds the most important factors of decay are the amount and composition of soluble salts, water depth, amount of dissolved gases, the direction of water currents and the role of both microscopic and macroscopic living organisms.
As the most influential factors of deterioration of historical objects should be pointed out as the relative humidity and air pollution while in archaeological objects a crucial role has composition, depth, humidity and amount of gasses in the soil. Rust and dirt on metal as a result of corrosion and pollution.Īn essential cause of deterioration is corrosion of metal objects or object deterioration by interaction with the environment.
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