20.500.12556/DKUM-54550 INHIBICIJSKA UČINKOVITOST NEIONSKEGA SURFAKTANTA TRITON-X-100 V KLOROVODIKOVI KISLINI INHIBITION EFFICIENCY OF NON-IONIC SURFACTANT TRITON-X-100 IN HYDROCHLORIC ACID Namen diplomskega dela je bil s pomočjo gravimetrijske metode določiti inhibicijske lastnosti neionskega surfaktanta TRITON-X-100 v primeru točkaste korozije na nerjavnem jeklu PROKRON 11sp v klorovodikovi kislini. Izbrali smo si raztopino kisline HCl štirih različnih koncentracij: c = 1,0 mol L-1, 0,5 mol L-1, 0,1 mol L-1 ter 0,05 mol L-1. Koncentracije dodanega inhibitorja TRITON-X-100 so bile sledeče; c = 5×10-3, 10-3, 5×10-4, 10-4 ter 5×10-5 mol L-1. Pri raztopini kisline s koncentracijo c = 1,0 mol L-1 ter 0,5 mol L-1 so bile uporabljene koncentracije TRITON-X-100 c = 5×10-3 mol L-1, 5×10-4 mol L-1 in 5×10-5 mol L-1. Pri raztopini kisline s koncentracijo c = 0,1 mol L-1 smo zraven teh koncentracij TRITON-X-100 dodali še koncentracijo c = 10-3 mol L-1, medtem ko smo pri raztopini kisline koncentracije c = 0,05 mol L-1 uporabili še koncentracijo TRITON-X-100 c = 10-4 mol L-1. Podrobneje smo obdelali raztopino klorovodikove kisline HCl s koncentracijo c = 0,05 mol L-1, kateri smo dodali pet različnih koncentracij neionskega surfaktanta TRITON-X-100. Zanimal nas je predvsem pojav prirastka mase, ki se pojavi prav v primeru pri že prej omenjeni koncentraciji klorovodikove kisline. Ugotovili smo, da ta pojav ni naključje, saj se pojavi pri vseh dodanih koncentracijah neionskega surfaktanta TRITON-X-100, kar nakazuje na uspešno inhibicijo zaradi nastale adsorbirane plasti. Proučevali smo korozijsko dogajanje v mirujočem korodirnem mediju v časovnih razmakih dveh, osmih in štiriindvajsetih ur. Uporabili smo gravimetrično metodo ter slikanje površin jekla z uporabo optičnega mikroskopa. Ugotovili smo, da inhibitor TRITON-X-100 že pri nizkih koncentracijah zadovoljivo inhibira korozijske procese v raztopinah klorovodikove kisline. The purpose of this thesis has been to determine with the help of the gravimetric method the inhibition properties of nonionic surfactant TRITON-X-100 in the case of pitting corrosion on the stainless steel PROKRON 11sp in hydrochloric acid. We have chosen the acid solution HCl of four different concentrations: c = 1,0 mol L-1, 0,5 mol L-1, 0,1 mol L-1 and 0,05 mol L-1. The concentrations of the added inhibitor TRITON-X-100 were as follows; c = 5×10-3, 10-3, 5×10-4, 10-4 and 5×10-5 mol L-1. By the acid solution with concentrations c = 1,0 mol L-1 and 0,5 mol L-1 there were used the following concentrations of TRITON-X-100 c = 5×10-3 mol L-1, 5×10-4 mol L-1 in 5×10-5 mol L-1. By the acid solution with the concentration c = 0,1 mol L-1 we also added the concentration c = 10-3 mol L-1, while by the acid solution with the concentration c = 0,05 mol L-1 we also used concentration TRITON-X-100 c = 10-4 mol L-1. We analyzed more specifically the solution of hydrochloric acid HCl with the concentration c = 0,05 mol L-1, which we added five different concentrations of nonionic surfactant TRITON-X-100. We were particularly interested in the occurrence of weight gain that occurs by the above mentioned concentration of hydrochloric acid. We found out that this occurrence is not a coincidence, since it appears at all added concentrations of the nonionic surfactant TRITON-X-100, which indicates a successful inhibition because of the created adsorbed layer. We studied the corrosion events in stationary corrosive medium at time intervals of two, eight and twenty-four hours. We used the gravimetric method and painting the surfaces of steel using an optical microscope. We discovered that the inhibitor TRITON-X-100 already by low concentrations sufficiently inhibits the corrosion processes in the solutions of hydrochloric acid. korozija točkasta kroozija surfaktanti učinkovitost inhibitorjev gravimetrična metoda corrosion pitting surfactants inhibition efficiency gravimetric method true true false [T. Zadravec] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2015-09-04 12:26:05 2015-10-29 13:58:27 2022-06-06 03:05:45 2021-05-12 03:11:31 2015 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.197.3:620.193.4(043.2) 19426326 URN:SI:UM:DK:PERKTXL0 UN_Zadravec_Tamara_2015.pdf UN_Zadravec_Tamara_2015.pdf 1 8DBFD270C9FDB2C53DEFB24C6974DFA4 4ed4667ca3e2b64cc20e138bcf568ed4888d30fbb26b5d0df8bec94368018e53 c03f6ea4-7c07-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=81591 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0