UNTERSUCHUNG VON KORROSIONSINHIBITOREN SÄURIGER BEIZLÖSUNGEN IN DER ANWESENHEIT VON KOMPLEXBILDERN

Corrosion of Soviet and Hungarian carbon steels has been examined in 6% solution of hydrochloric acid. The virtual activation energy and the frequency coefficient have been determined with the help of the Arrhenius equation. The corrosion effect of the Fe(III)-ions, furtheron the inhibitor effect of oxalic acid, sulfosalycilic acid, sodium triphosphate and sodium fluoride have been investigated

КОРРОЗИОННАЯ СТОЙКОСТЬ И ИЗНОСОСТОЙКОСТЬ ПОРОШКОВЫХ ТВЕРДЫХ СПЛАВОВ НА ОСНОВЕ КАРБИДА ТИТАНА И ХРОМИСТОЙ СТАЛИ. Korrozionnaâ stojkost' i iznosostojkost' poroškovyh tverdyh splavov na osnove karbida titana i hromistnj stali

TiC-Fe-Cr alloys prepared from titanium-carbide and steel basis metal by powder metallurgy were studied with concerning their corrosion and abrasion resistance in water. Such alloys is used for preparing of pieces exposed to corrosion. Our experiments have indicated that the abrasion is not independent for corrosion resistance. By weak corrosion resistance abrasion decreases too because that the corroded metal do not bound together the hard titanium-carbide grains. Good abrasion is only by good corrosion resistance attainable. The corrosive abrasion is dependent on the hardness only in the case of suitable corrosion resistance of the solid alloys

КОРРОЗИОННАЯ СТОЙКОСТЬ НЕРЖАВЕЮЩИХ ПОРОШКОВЫХ ТВЕРДЫХ СПЛАВОВ TiC-СТАЛЬ. Korrozionnaâ stojkost' neržaveůşih poroškovyh tverdyh splavov TiC-stal'

Corrosion properties of powder metallurgical solidy alloys made of high wear resistance TiC and of corrosion-proof steel has been investigated in NaOH solution of 20% conc., in 10% HNO3, in 3% H2SO4 and in 44% H3PO4 solutions. The corrosion of solid alloys is deteriorating not only the metal, but also reduces its wear resistance. Our preliminary experiments performed with some corrosion-proof steels disclosed that the corrosion resistance of solid alloys made of nickel-free steels with high chrome content is poor. Solid alloys produced of austenite chromonickel steels with TiC proved to be acceptable. These solid alloys did not corrode at all in NaOH, as well as in acidic solutions. In the presence of inhibitors their corrosion resistance is further improved