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  2. Hydrogen damage - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_damage

    Hydrogen picked up during melting and casting segregates at internal voids and discontinuities and produces these defects during forging. Fish-eyes are bright patches named for their appearance seen on fracture surfaces, generally of weldments. Hydrogen enters the metal during fusion-welding and produces this defect during subsequent stressing.

  3. Conservation and restoration of metals - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    Derveni krater, bronze, 350 BC, height: 90.5 cm (35 1 ⁄ 2 in.), Inv. B1, Archaeological Museum of Thessaloniki, after cleaning and conservation. Conservation and restoration of metals is the activity devoted to the protection and preservation of historical (religious, artistic, technical and ethnographic) and archaeological objects made partly or entirely of metal.

  4. Parts cleaning - Wikipedia

    en.wikipedia.org/wiki/Parts_cleaning

    Parts cleaning is a step in various industrial processes, either as preparation for surface finishing or to safeguard delicate components. One such process, electroplating, is particularly sensitive to part cleanliness, as even thin layers of oil can hinder coating adhesion . Cleaning methods encompass solvent cleaning, hot alkaline detergent ...

  5. Remora - Wikipedia

    en.wikipedia.org/wiki/Remora

    The remora ( / ˈrɛmərə / ), sometimes called suckerfish or sharksucker, is any of a family ( Echeneidae) of ray-finned fish in the order Carangiformes. [4] Depending on species, they grow to 30–110 cm (12–43 in) long. Their distinctive first dorsal fins take the form of a modified oval, sucker-like organ with slat-like structures that ...

  6. Wooden fish - Wikipedia

    en.wikipedia.org/wiki/Wooden_fish

    Wooden fish are often (in Chinese temples) placed on the left of the altar, alongside a bell bowl, its metal percussion counterpart. Wooden fish often rest on a small embroidered cushion to prevent unpleasant knocking sounds caused from the fish lying on the surface of a hard table or ground, as well as to avoid damage to the instrument.

  7. Algae eater - Wikipedia

    en.wikipedia.org/wiki/Algae_eater

    Algae eater or algivore is a common name for any bottom-dwelling or filter-feeding aquatic animal species that specialize in feeding on algae and phytoplanktons. Algae eaters are important for the fishkeeping hobby and many are commonly kept by aquarium hobbyists to improve water quality. [1] They are also important primary consumers that relay ...