Alloys with magnesium

The low strength of aluminum can be considerably improved by alloying with magnesium, silicon, manganese, copper, etc. However, the alloys liave substantially the same modulus of elasticity (70 kN/mm ). 

The neutral electrolyte, often sea water, can be replaced by aqueous NaOH providing that the anode is alloyed with magnesium and tin. Alkaline aluminium-air cells have significantly greater power densities. 

X2(>2() (I Lii. which is a structural ulloy with improved high-temperaturc strength. In another early Li alloy, about 1J v Li is alloyed with magnesium in the LA 141 alloy, designed for very light-weight structural applicalions. notably in aerospace applications,... 

In support of that explanation, X-ray analysis of the catalyst after use indicated the presence of MgO. Hence, the catalytically active phase was finely divided copper in intimate contact with magnesia, quasi as carrier. The same phenomenon was observed with the Zintl-phase alloys of silver and magnesium. Such catalysts were then deliberately prepared by coprecipitation of copper and silver oxides with magnesium hydroxide, followed by dehydration and reduction. Table I shows that these supported catalysts had the same activation energies as those formed by in situ decomposition of copper and silver alloys with magnesium. 

Violent decomposition, with evolution of hydrogen chloride, may occur when 1,1,1-trichloroethane comes into contact with aluminium or its alloys with magnesium [10]. Aluminium-dusty overalls were cleaned by immersion in trichloroethylene. During subsequent drying, violent ignition occurred. This was attributed to presence of free... 

Of the 106 or so natural and man-made elements, less than 20% are non-metals. At present, few of the metals are used to any large extent by man, either because of their rarity or their instability. The major "tonnage metals are iron, copper, aluminium, zinc, nickel, and lead. These metals may be alloyed with one another, such as copper and zinc to form brass, and/or may be alloyed with smaller quantities of other metals. Steels are commonly alloyed with chromium, vanadium, molybdenum, or tungsten. Aluminium, for increased lightness and strength, may be alloyed with magnesium. 

The lithium is in the form of an alloy with magnesium or aluminium which retains much of the tritium until it is released by treatment with acid. Alternatively the tritium can be produced by neutron irradiation of enriched LiF at 450° in a vacuum and then recovered from the gaseous products by diffusion through a palladium barrier. As a result of the massive production of tritium for thermonuclear devices and research into energy production by fusion reactions, tritium is available cheaply on the megacurie scale for peaceful purposes. The most convenient way of storing the gas is to react it with finely divided uranium... 

Because of their metallic and alkaline properties, potassium and especially sodium are widely used in a variety of industrial processes both as metals and as compounds with various other elements. Lithium is rarely used, but does find application in lightweight alloys with magnesium. Rubidium and cesium are not commonly utilized industrially, except for some applications in electronics. Sodium and potassium are essential for life, sodium being the principal extracellular and potassium the major intracellular monovalent cations. The other alkali metals have no essential biological role, see ALSO Bunsen, Robert Cesium Davy, Humphry Francium Lithium Mendeleev, Dimitri Potassium Rubidium Sodium. 

Some intermetallics of magnesium such as Mg2Ni and Mg2Cu can make alloys with magnesium metal supercorrosive. These alloys are intimate mixtures of short-circuited anodic and cathodic particles that rapidly corrode in seawater and develop hydrogen. Two pounds of the composite can make a cubic meter of hydrogen in five minutes. 

Fuel elements of larger inner diameter used at Unit 2 compared to that of Unit 1 allowed to lower heat flux and hydraulic resistance. With the equal outer diameter (20 mm), fuel elements inner diameter of the BWs at Unit 1 were 9.4 x 0.6 mm while that of Unit 2 were 12 x 0.6 mm. Diameter of the central tube for feeding the coolant was also increased. There were no other differences in the BWs construction used at BNPP Units 1 and 2. Uranium—molybdenum alloy with magnesium filler was used as fuel in the BWs. 

Only the first digit has practical importance. It designates the series to which the alloy belongs. For example, all the alloys of the series 5XXX are alloys with magnesium. 

Alloys with magnesium have an excellent resistance to marine corrosion. They are used for upper works [14]. 

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