Acidic magnesium alloys

Very small quantities of bismuthine are obtained when a bismuth-magnesium alloy, BijMgj, is dissolved in hydrochloric acid. As would be expected, it is extremely unstable, decomposing at room temperature to bismuth and hydrogen. Alkyl and aryl derivatives, for example trimethylbismuthine, Bi(CHj)3, are more stable. 

The Stability of the natural oxide film reinforced by the chromate ion determines the conditions of pH, ratio of activating anion to chromate, and temperature at which the oxide is broken down and a chromate film deposited. Thus magnesium alloys can be chromate-treated in nearly neutral solutions, whereas aluminium alloys can be treated only in solutions of appreciable acidity or alkalinity. 

Magnesium alloys Dip for approximately 1 min in boiling 15% chromic acid to which has been added with agitation 1 % silver chromate solution. 

O-Acetylsalicylic acid, 3137 Aluminium, 0048 Aluminium-cobalt alloy, 0049 Aluminium-magnesium alloy, 0053 Aluminium stearate, 3914 Benzoic acid, 2732... 

Acetoacet-4-phenetidide, 5.9, 680 atomised almninimn, 5.7, >1.36kbar/s aluminium flake, 8.6, >1.36kbar/s almninimn-cobalt alloy, 6.25, 748 aluminium-magnesium alloy, 5.85, 680 almninimn-nickel alloy, 6.5, 680 aluminium stearate, 5.85, 680 benzoic acid, 6.85, 700 2,2-bis(4-hydroxyphenyl) propane, 5.5, 803 calcimn silicide, 5.85, 1.36 kbar/s calcimn stearate, 6.6, >680 cellulose nitrate, >17.4, >1.42 kbar/s 2-chlorobenzyfidenemalononitrile, 6.1, >680 comnarone-indene resin, 6.3, 748. 

Hydrofluoric acids - [ALUMINUMAND ALUMINUM ALLOYS] (Vol 2) - [ALUMINUMCOMPOUNDS - INTRODUCTION] (Vol2) - [FINECHEMICALS - STANDARDS] (Vol 10) -effect on glass [GLASS] (Vol 12) -magnesium reaction [MAGNESIUM AND MAGNESIUM ALLOYS] (Vol 15) -reaction with fluorine [FLUORINE] (Vol 11) - [COAL] (Vol 6)... 

Acetoacet-4-phenetidide, 3523 O-Acetylsalicylic acid, 3131 Aluminium, 0048 Aluminium stearate, 3908 Aluminium—cobalt alloy, 0049 Aluminium—magnesium alloy, 0053 Benzoic acid, 2728... 

Pattison and Degering (16) have prepared a catalyst of the Raney type from a nickel-magnesium alloy. These authors used acetic acid to dissolve the inactive portion of the alloy. The catalyst was found to be as active as the W-4 Raney nickel of Pavlic and Adkins (10) and twice as active as the W-2 catalyst of Mozingo (9). 

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