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  2. Allura Red AC - Wikipedia

    en.wikipedia.org/wiki/Allura_Red_AC

    Allura Red AC, also known as FD&C Red 40 or E129, is a red azo dye commonly used in food. It was developed in 1971 by the Allied Chemical Corporation, who gave the substance its name. [1] [2] It is usually supplied as its red sodium salt but can also be used as the calcium and potassium salts. These salts are soluble in water.

  3. Aluminium joining - Wikipedia

    en.wikipedia.org/wiki/Aluminium_joining

    Aluminium alloys are often used due to their high strength-to-weight ratio, corrosion resistance, low cost, high thermal and electrical conductivity.There are a variety of techniques to join aluminium including mechanical fasteners, welding, adhesive bonding, brazing, soldering and friction stir welding (FSW), etc. Various techniques are used based on the cost and strength required for the joint.

  4. Skin effect - Wikipedia

    en.wikipedia.org/wiki/Skin_effect

    Iron rods work well for direct-current (DC) welding but it is difficult to use them at frequencies much higher than 60 Hz. At a few kilohertz, an iron welding rod would glow red hot as current flows through the greatly increased AC resistance resulting from skin effect, with relatively little power remaining for the arc itself.

  5. Sodium bis (2-methoxyethoxy)aluminium hydride - Wikipedia

    en.wikipedia.org/wiki/Sodium_bis(2-methoxyethoxy...

    Sodium bis(2-methoxyethoxy)aluminium hydride (SMEAH; [1] trade names Red-Al, Synhydrid, Vitride) is a hydride reductant with the formula NaAlH 2 (OCH 2 CH 2 OCH 3) 2. The trade name Red-Al refers to its being a reducing aluminium compound. It is used predominantly as a reducing agent in organic synthesis.

  6. List of welding processes - Wikipedia

    en.wikipedia.org/wiki/List_of_welding_processes

    This is a list of welding processes, separated into their respective categories. The associated N reference numbers (second column) are specified in ISO 4063 (in the European Union published as EN ISO 4063 ). [ 1 ]

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