Sinergistični inhibicijski učinek Na-soli na kinetiko korozije nerjavnega jekla "1.4057" v raztopini H2SO4

diplomsko delo univerzitetnega študijskega programa

Natalija Zafošnik (Author), Andreja Goršek (Mentor), Darja Pečar (Co-mentor)

Abstract

Proučevali smo vpliv dveh pogosto uporabljenih inhibitorjev, natrijevega nitrita in natrijevega fosfata, na nerjavno jeklo »1.4057« v raztopini H2SO4 s koncentracijo, c = 0,075 mol/L. Testiranja smo izvajali pri različnih temperaturah in različnih koncentracijah inhibitorjev. Iz podatkov o izgubi mase smo določili hitrost korozije, učinkovitost inhibitorjev, adsorpcijske izoterme in aktivacijsko energijo korozijskih procesov. Ugotovili smo, da hitrost korozije z višanjem koncentracije inhibitorjev pada, z dvigom temperature narašča in da učinkovitost posameznih inhibitorjev narašča tako z dvigom njihove koncentracije, kakor tudi temperature medija.

Keywords

korozija;inhibitorji;gravimetrična metoda;hitrost korozije;učinkovitost inhibitorjev;adsorpcijske izoterme;aktivacijska hitrost;

Data

Language:	Slovenian
Year of publishing:	2010
Source:	Maribor
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[N. Zafošnik]
UDC:	541.183(043.2)
COBISS:	14995222
Views:	2158
Downloads:	129
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Synergistic inhibition effect of sodium salts on the kinetics of corrosion of '1.4057' stainless steel in the H2SO4 solution
Secondary abstract:	We have studied the impact of two commonly used inhibitors, sodium nitrite and sodium phosphate, in stainless steel »1.4057« in the H2SO4 solution with concentration, c = 0.075 mol/L. Tests were performed at different temperatures and different concentrations of inhibitors. From determined weight loss, corrosion rate, inhibition efficiency, adsorption isotherms and activation energy were determined. We found that the corrosion rate decreases by increasing the inhibitor concentration, increases with temperature rise and that the efficiency of individual inhibitors increases with increase of their concentration, as well as the temperature of the medium.
Secondary keywords:	corrosion;inhibitors;gravimetric method;corrosion rate;inhibition efficiency;adsorption isitherms;activation energy;
URN:	URN:SI:UM:
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	XV, 60 f.
Keywords (UDC):	mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;
ID:	1012950