Exchange reactions of solid oxides. Part VI. The reactions of carbon monoxide, carbon dioxide, and oxygen on cuprous oxide, nickel oxide, and chromium oxide

Author(s):  
E. R. S. Winter

In a previous communication* the authors described a method of measuring rates of reaction of molecules and atoms which were being activated by electron collision in suitably constructed triode tubes. the method has since been extended to study the decomposition of carbon monoxide and its interactions with hydrogen. Carbon monoxide has long been known to undergo decomposition, chiefly into carbon and carbon dioxide in the silent discharge. A mixture of solid oxides containing chiefly C 3 O 2 is always observed. Carbon monoxide and hydrogen yield an even greater diversity of products. Thus Losanitsch and Jovitschitsch and de Hemptinne noted the production of formaldehyde and its polymers and also some formic acid. Slosse and Nowak ¶ and Löb** obtained formaldehyde and methyl alcohol, while the latter also found glycollic aldehyde. M. Berthelot stated that excess of hydrogen favours the production of (CH 2 O) n , whereas excess of carbon monoxide yields (C 3 H 4 O 3 ) n .


2018 ◽  
Vol 216 ◽  
pp. 03001 ◽  
Author(s):  
Evgeny Ivanayskiy ◽  
Aleksei Ishkov ◽  
Aleksandr Ivanayskiy ◽  
Iakov Ochakovskii

The paper studies the influence of shielding gas on the composition and the structure of weld joint metal of 30MnB5 steel applied in essential parts of automobiles and tractors. The welding was performed in inert, oxidizing and reducing atmospheres. It was established that TIG welding with argon used as shielding gas did not provide the required mechanical properties when using conventional welding materials. Carbon dioxide during MAG welding caused partial burning of alloying elements. Carbon monoxide used as shielding gas was proved to form reducing atmosphere enabling to obtain chemical composition close to the base metal composition. Metallographic examinations were carried out. The obtained results provided full-strength weld, as well as the required reliability and durability of welded components and joints.


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