Nickel ammonium sulphate chloride

Desupersaturation methods for crystal growth rate measurements have been reported for ammonium alum (Bujac and Mullin, 1969), potassium sulphate (Jones and Mullin, 1973a), nickel ammonium sulphate (Ang and Mullin, 1979), potassium chloride (Nyvlt, 1989) and succinic acid (Qui and Rasmuson, 1990). 

Resistance to corrosion of electroless nickel, both as-deposited and, in most cases, after heating to 750°C, is listed by Metzger for about 80 chemicals and other products. Resistance was generally satisfactory, with attack at a rate below 13 /im/year. The only substances causing faster attack were acetic acid, ammonium hydroxide or phosphate, aerated ammonium sulphate, benzyl chloride, boric acid, fluorophosphoric acid, hydrochloric acid, aerated lactic acid, aerated lemon juice, sodium cyanide and sulphuric acid. 

Nickel-iron alloys are more resistant than iron to attack by solutions of various salts. In alternate immersion tests in 5% sodium chloride solution Fink and De Croly determined values of 2-8, 0-25 and 0-5 g m d for alloys containing 37, 80 and 100% nickel compared with 46 g m d for iron. Corrosion rates of about 0.4 g m d are reported by Hatfield for Fe-30Ni alloy exposed to solutions containing respectively 5 Vo magnesium sulphate, 10 Vo magnesium chloride and 10% sodium sulphate the same alloy corroded at a rate of about 1.2 g m d in 5% ammonium chloride. 

Nickel sulphate (N1S04-7H20) 180g/1 Nickel chloride (NiClj-fiHjO) 30g/1 Ammonium chloride (NH4CI) 25 g/1 Boric acid (HjBOj) 30 g/1... 

J.A. Johnson, B.I. Whittington, Effect of Ammonium, Sodium and Potassium Sulphates and Chlorides in Pressure Acid Leaching of Western Australian Nickel Laterite Ore, Pressure Hydrometallurgy, M.J. Collins, V.G. Papangelakis, Eds, CIM, Montreal, Canada, 2004, 199-214. 

A successful quantitative analysis of the reaction between aquated nickel(ii) ions and azo(2-pyridine)4 -N,N-dimethylaniline (46) in sodium lauryl sulphate leads to conclusions that catalysis occurs at the micellar surface and is due entirely to concentration of the reactants (Figure 4). Addition of sodium chloride (sodium ions are claimed to be completely displaced by nickel ions at the micelle surface) decreases the reaction rate marginally but tetraethyh ammonium chloride has a much more pronounced inhibitory effect. The reaction characteristics were found to be strongly dependent on the source of sodium lauryl sulphate. There is significant catalysis below the c.m.c. if both... 

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