20.500.12556/DiRROS-23711 Corrosion properties of different forms of carbon steel in simulated concrete pore water Korozijske lastnosti različnih oblik jekel v simulirani porni vodi betona Carbon steel, such as concrete-reinforcing steel, tends to undergo corrosion processes when exposed to certain environmental actions. These are the carbonation of concrete and the ingress of chlorides into the concrete from the environment. Many times, the carbonation and chloride contamination are simultaneous processes leading to a harsh corrosion environment and subsequent corrosion problems. Monitoring the state of corrosion is thereby a very useful and powerful tool for following and evaluating the lifetime of reinforced concrete structures. Electrochemical measurements were performed to investigate different forms of carbon steel in simulated concrete pore water at different pH values with and without the presence of chlorides. Morphological characteristics of three different types of carbon steel were studied and SEM/EDX and Raman analyses of the corrosion products were performed. It was found that steel in the form of a sheet has a higher corrosion resistivity than a steel wire and a steel rod, and that the steel rod has a higher corrosion resistivity than the steel wire. The corrosion layer on carbon steel is very diverse; several morphologies were found and analyzed. Maloogljično jeklo, kot je jeklena betonska armatura, je izpostavljeno korozijskim procesom zaradi vplivov okolja. To sta karbonatizacija betona ter vdor kloridnih ionov iz okolja. Mnogokrat se karbonatizacija in vdor kloridov zgodi istočasno, kar privede do hitrega korozijskega propadanja. Spremljanje korozije na objektih je zato zelo dobro orodje za napoved in oceno preostanka trajnostne dobe nekega objekta. Elektrokemijske preiskave smo izvedli v simulirani raztopini porne vode v betonu pri različnih pH vrednostih ter brez in v prisotnosti kloridnih ionov. Določili smo mikrostrukturne značilnosti posameznih vrst ogljičnih jekel ter morfologijo korozijskih produktov z EDX/SEM-analizo ter Ramansko spektroskopijo. Ugotovili smo, da je najbolj korozijsko odporno ogljično jeklo v obliki folije, sledi palica, najslabše korozijske lastnosti pa ima žica iz ogljičnega jekla. Korozijski produkti na jeklu so različnih morfoloških oblik in sestav. carbon steel metallography corrosion concrete water ogljično jeklo metalografija korozija beton voda true false false Inštitut za kovinske materiale in tehnologije Angleški jezik Slovenski jezik Neznano 2025-09-26 10:16:19 2025-09-26 10:23:28 2025-10-24 03:54:54 0000-00-00 00:00:00 2014 0 0 str. 51-57 št. 1 Letn. 48 jan.-feb. 2014 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2014-01-01 620.193:624.94 1580-2949 2004071 http://mit.imt.si/izvodi/mit141/cesen.pdf 0 15ca83c2-9ab1-11f0-9bb7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=35135 RAZ_Cesen_Ales_2014.pdf RAZ_Cesen_Ales_2014.pdf 1 6B6ED555B2F36EBD0772566A8DCF806C 168a2f6ab318442a209a098c5b9d364663b0802c247232e3d7eb1f2b9f9ab5b4 0e46ee16-9ab2-11f0-9bb7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=35136 Zavod za gradbeništvo Slovenije 0 0 0