Accession Number : AD0434230


Title :   DISSOLUTION RATES OF ZONE REFINED IRON AND STEEL IN HCL, H2S04 AND NACL AQUEOUS SOLUTIONS


Corporate Author : MISSOURI UNIV-ROLLA SCHOOL OF MINES AND METALLURGY


Personal Author(s) : Straumanis, M E ; James, W J ; Welch, G E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/434230.pdf


Report Date : Feb 1964


Pagination or Media Count : 29


Abstract : Zone refinded iron is slowly attacked by acids. Rates obtained in 0.5 N H2S04 and HCl are 0.056 and 0.023 mg/sq. cm/hr respectively at 25 C in the presence of air. In hydrogen the dissolution rates are slower. In a 3% NaCl solution the rate is about one fifth of that in 0.5 N HCl. The order of reaction starting with I N H2SO4 is above 2, indicating that the rate is unduly slowed down at low concentrations of the acid and that the resistance to corrosion decreases with increasing concentration of the acid. The dissolution rates of two steels containing among other impurities 0.44 and 0.85% C respectively, were determined in various concentrations (up to 7 N) of H2SO4 and HCl as a function of temperature (between 15 and 25 C).


Descriptors :   *CORROSION , *STEEL , *IRON , *ZONE MELTING , REACTION KINETICS , CHEMICAL REACTIONS , IRON ALLOYS , CHEMICAL ANALYSIS , SULFURIC ACID , CORROSIVE LIQUIDS , SODIUM COMPOUNDS , HYDROCHLORIC ACID , SOLUBILITY , CHLORIDES , HYDROGEN , AIR , IMPURITIES


Subject Categories : Inorganic Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE