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State of the art of metal reoxidation study of iron castings
Metallic alloys Metal reoxidation Oxygen activity measurement
2009/12/1
Purpose: Metal reoxidation causes a number of iron castings defects, particularly when pouring them in greensand
moulds. One of them is pinholes the occurrence of which is explained by several hypoth...
Reduction and Reoxidation of Nontronite: Questions of Reversibility
Dehydroxylation Ferric Ferrous Hydroxylation Infrared spectroscopy Iron Mossbauer spectroscopy Nontronite Oxidation
2011/12/1
Abstract: Redox cycles are common in nature and likely have a profound effect on the behavior of soils and sediments. This study examined a key component of redox cycles in smectites, namely, the reox...
Reduction and Reoxidation of Nontronite: Extent of Reduction and Reaction Rates
Color change Mossbauer spectroscopy Nontronite Oxidation Reduction Visible absorption spectroscopy
2012/1/4
The reduction and reoxidation of three nontronite samples, GAN (API H-33a, Garfield, Washington), SWa-1 (ferruginous Washington smectite), and NG-1 (Hohen Hagen, Federal Republic of Germany) were stud...
Role of Structural Hydrogen in the Reduction and Reoxidation of Iron in Nontronite
Hydrogen Nontronite Oxidation Reduction Structural sites Tritium
2012/2/2
The effects of reduction and reoxidation of octahedral Fe3+ on the exchange of structural hydrogen in nontronite were determined using tritium (3H) as a label element. The uptake of H from the surroun...
Effects of Reduction and Reoxidation of Structural Iron on the Surface Charge and Dissolution of Dioctahedral Smectites
Dissolution Iron Nontronite Oxidation Reduction Smectite Surface area
2012/2/6
The effect of Fe oxidation state on the surface charge (CEC) and solubility of smectites were studied using the <2-祄, Na+-saturated fraction of an Upton, Wyoming; a Czechoslovakian; and a New Zealand ...