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The safety and longevity of the object is the highest priority, ensuring the treatment will not cause further damage. Consideration must be given to the structural integrity, artist intent, and original context. By following the Code of Ethics by AIC [5] the treatment plan will aid a conservator in making an informed and safe decision for ...
The NaOH (caustic soda) and elevated temperature cause Fe 3 O 4 (black oxide) to form on the surface of the metal instead of Fe 2 O 3 (red oxide; rust). While it is physically denser than red oxide, the fresh black oxide is porous, so oil is then applied as post treatment to the heated part, which seals it by "sinking" into it.
Some painters had their works lined immediately after, or even before, completion. [2] The treatment was intended to mitigate mechanical damage and some nineteenth century academics considered it a necessary step before any other treatments should be enacted. [1] This treatment was considered an inevitable task in the conservation of paintings. [3]
Rust converters are chemical solutions or primers that can be applied directly to an iron or iron alloy surface to convert iron oxides into a protective chemical barrier. These compounds interact with iron oxides, especially iron(III) oxide , converting them into an adherent black layer ( black oxide ) that is more resistant to moisture and ...
Phosphate conversion coating is a chemical treatment applied to steel parts that creates a thin adhering layer of iron, zinc, or manganese phosphates to improve corrosion resistance or lubrication or as a foundation for subsequent coatings or painting. [1] [2] [3] It is one of the most common types of conversion coating.
Bluing, sometimes spelled as blueing, is a passivation process in which steel is partially protected against rust using a black oxide coating. It is named after the blue-black appearance of the resulting protective finish.
Sharon Osbourne is swearing off future plastic surgery after recovering from a “horrendous” facelift last year. “Time is against me,” she says. Sharon Osbourne, 70, Reveals Why She’s ...
Pickling is a metal surface treatment used to remove impurities, such as stains, inorganic contaminants, and rust or scale from ferrous metals, copper, precious metals and aluminum alloys. [1] A solution called pickle liquor , which usually contains acid , is used to remove the surface impurities.