Hot corrosion of metallic materials in humid acid atmosphere in the presence of molten saltsThe world problem of the pollution makes in thelast few years particularly interesting the plants for theincineration of the urban solid refuse. These plants are able toeliminate clearly considerable quantities...
The hot corrosion behaviour of the γ-Y_2Si_2O_7 ceramic exposed to NaVO_3 or V_2O_5 molten salt was studied at 1000-1300℃. YVO_4 was identified as the corrosion product due to the chemical interaction of the two corrosive agents with the γ-Y_2Si_2O_7 ceramic. Although YVO_...
A method to protect the carbon steel against corrosion by molten salt at high temperature was proposed, involving the formation of a calcium carbonate layer on the carbon steel surface. The stability of the layer was tested under isothermal and temperature cycling conditions up to 500 °C, in...
Another method for the separation of gold and silver is the so-called cyanide process. The Parkes process, which is based on silver being soluble in molten zinc while lead is not, is used to free silver from lead ores. Since almost all the metals are found combined with other elements in...
The cause of corrosion is the difference in energy of metals and their natural ores. Energy is needed to extract any metal from its ore energy. It is this ‘excess energy’ which drives the corrosion as the metal will try to revert to its natural state. Electrochemically, corrosion is a ...
The environmental impacts in SHG zinc were higher than in redistilled zinc, for all the impact categories due to the great influence of heavy metals emission. The results for zinc and paint protections showed that under the same level of corrosion, a greater thickness of paint is needed to ...
Tests showed that liquid Rb was more aggressive than other alkali metals and that the oxygen in the Rb promoted hot corrosion as suggested by the multilayers of corrosion products. The multilayer corrosion products, which changed with thickness depending on temperature, consisted of two non-adherent...
The peculiar properties of plasma formation on the surface of different liquid metals by femtosecond laser radiation have been studied. It is shown that plasma formation and generation of hard X-radiation on the surface of molten metal depends substantially on the contrast and weakly on the polariza...
(icorr.) and impedance parameters. By comparing the data obtained for both HCl and H3PO4in all investigated electrodes, the corrosion current density (icorr.) in H3PO4was lower than that in HCl. Such behavior can be ascribed to the aggressive attack of Cl¯ ions on the surfaces of ...
He's developed a line of coins struck out of various common and uncommon metals: They are quite lovely, and very reasonably priced, considering the difficulty of creating some of them. This is the only coin in the series with a ribbed edge, which comes about because, unlike the others ...