"Corrosion rate of cathodically %22protected%22 steel in carbonate environment"@en . . . . "3"^^ . "P(FR-TI1/362), S" . . "CZ - \u010Cesk\u00E1 republika" . "Korozn\u00ED rychlost katodicky %22chr\u00E1n\u011Bn\u00E9%22 oceli v prost\u0159ed\u00ED uhli\u010Ditan\u016F" . "Nov\u00E1k, Pavel" . "Jedn\u00EDm ze zp\u016Fsob\u016F vysv\u011Btlen\u00ED mechanizmu ochrann\u00E9 funkce katodick\u00E9 ochrany je katodick\u00E1 pasivace. Vlivem katodick\u00E9 reakce doch\u00E1z\u00ED v okol\u00ED \u00FAlo\u017En\u00E9ho za\u0159\u00EDzen\u00ED k alkalizaci p\u016Fdy, kter\u00E1 usnad\u0148uje p\u0159echod \u017Eeleza do pasivn\u00EDho stavu. K zapasivov\u00E1n\u00ED oceli v\u0161ak dojde pouze v p\u0159\u00EDpad\u011B, \u017Ee vlo\u017Een\u00FD ochrann\u00FD potenci\u00E1l m\u00E1 kladn\u011Bj\u0161\u00ED hodnotu ne\u017E pasiva\u010Dn\u00ED potenci\u00E1l. C\u00EDlem pr\u00E1ce bylo ur\u010Dit z\u00E1vislost pasiva\u010Dn\u00EDho potenci\u00E1lu a korozn\u00ED rychlosti na korozn\u00EDm potenci\u00E1lu v prost\u0159ed\u00ED uhli\u010Ditanu o r\u016Fzn\u00E9m pH s vyu\u017Eit\u00EDm elektrochemick\u00FDch metod a rezistometrick\u00E9 techniky. Korozn\u00ED rychlost \u017Eeleza p\u0159i dlouhodob\u00E9 expozici byla ur\u010Dena pomoc\u00ED rezistometrick\u00E9ho \u010Didla. Hodnota pasiva\u010Dn\u00EDho potenci\u00E1lu kles\u00E1 s rostouc\u00ED hodnotou pH. Ocel se v prost\u0159ed\u00ED uhli\u010Ditanu pasivuje p\u0159i b\u011B\u017En\u00E9m ochrann\u00E9m potenci\u00E1lu ?850 mV/CSE dosa\u017Een\u00EDm pH 12. Pod touto hodnotou ocel koroduje v aktivn\u00EDm stavu, a to pro \u00FAlo\u017En\u00E1 za\u0159\u00EDzen\u00ED nep\u0159ijatelnou korozn\u00ED rychlost\u00ED (} 0,01 mm/rok)." . . "145658" . "Korozn\u00ED rychlost katodicky %22chr\u00E1n\u011Bn\u00E9%22 oceli v prost\u0159ed\u00ED uhli\u010Ditan\u016F" . "2"^^ . "1804-1213" . . . . "10.2478/v10227-011-0005-8" . "resistometry, cathodic protection, carbonates"@en . . "RIV/60461373:22310/12:43894769!RIV13-MPO-22310___" . "Korozn\u00ED rychlost katodicky %22chr\u00E1n\u011Bn\u00E9%22 oceli v prost\u0159ed\u00ED uhli\u010Ditan\u016F"@cs . . "Winerov\u00E1, K." . . "Corrosion rate of cathodically %22protected%22 steel in carbonate environment"@en . "RIV/60461373:22310/12:43894769" . "Cathodic passivation is one of the possible explanations of the protective mechanism of cathodic protection. Cathodic reaction taking place in the vicinity of buried equipment results in alkalinisation of soil, which facilitates transmission of iron in a passive state. However, the passivation of steel occurs only if the impressed protection potential is more positive than the passivation potential. The goal of this paper was to identify the passivation potential and corrosion rate dependence on the corrosion potential in carbonates with variable pH using electrochemical methods and a resistometric technique. We were measuring the corrosion rate of iron during a long-term exposure by a resistometric probe. The passivation potential drops with growing pH. Steel gets passivated in carbonates at a usual protection potential of ?850 mV/CSE by reaching pH 12. Below this point, steel corrodes in an active state at a corrosion rate of (} 0.01 mm/year), which is unacceptable for buried equipment."@en . "Kou\u0159il, Milan" . . . . "22310" . "Koroze a ochrana materi\u00E1l\u016F" . . . "Korozn\u00ED rychlost katodicky %22chr\u00E1n\u011Bn\u00E9%22 oceli v prost\u0159ed\u00ED uhli\u010Ditan\u016F"@cs . "3"^^ . . "56" . . "1" . "[BBA240860420]" . "Jedn\u00EDm ze zp\u016Fsob\u016F vysv\u011Btlen\u00ED mechanizmu ochrann\u00E9 funkce katodick\u00E9 ochrany je katodick\u00E1 pasivace. Vlivem katodick\u00E9 reakce doch\u00E1z\u00ED v okol\u00ED \u00FAlo\u017En\u00E9ho za\u0159\u00EDzen\u00ED k alkalizaci p\u016Fdy, kter\u00E1 usnad\u0148uje p\u0159echod \u017Eeleza do pasivn\u00EDho stavu. K zapasivov\u00E1n\u00ED oceli v\u0161ak dojde pouze v p\u0159\u00EDpad\u011B, \u017Ee vlo\u017Een\u00FD ochrann\u00FD potenci\u00E1l m\u00E1 kladn\u011Bj\u0161\u00ED hodnotu ne\u017E pasiva\u010Dn\u00ED potenci\u00E1l. C\u00EDlem pr\u00E1ce bylo ur\u010Dit z\u00E1vislost pasiva\u010Dn\u00EDho potenci\u00E1lu a korozn\u00ED rychlosti na korozn\u00EDm potenci\u00E1lu v prost\u0159ed\u00ED uhli\u010Ditanu o r\u016Fzn\u00E9m pH s vyu\u017Eit\u00EDm elektrochemick\u00FDch metod a rezistometrick\u00E9 techniky. Korozn\u00ED rychlost \u017Eeleza p\u0159i dlouhodob\u00E9 expozici byla ur\u010Dena pomoc\u00ED rezistometrick\u00E9ho \u010Didla. Hodnota pasiva\u010Dn\u00EDho potenci\u00E1lu kles\u00E1 s rostouc\u00ED hodnotou pH. Ocel se v prost\u0159ed\u00ED uhli\u010Ditanu pasivuje p\u0159i b\u011B\u017En\u00E9m ochrann\u00E9m potenci\u00E1lu ?850 mV/CSE dosa\u017Een\u00EDm pH 12. Pod touto hodnotou ocel koroduje v aktivn\u00EDm stavu, a to pro \u00FAlo\u017En\u00E1 za\u0159\u00EDzen\u00ED nep\u0159ijatelnou korozn\u00ED rychlost\u00ED (} 0,01 mm/rok)."@cs .