...Ajit Mishra; Dave Shoesmith; Paul Manning Hydrochloric acid (HCl) is an important mineral acid with many uses, including the pickling of steel, acid treatment of oil wells, and chemical cleaning and processing. This acid is extremely corrosive and its aggressiveness can change drastically depending...

..., particularly in acidic solutions, to polarize the Alloy 22 well into the transpassive region, leading to the observed high-corrosion rates. Alloy 22 chromium Hastelloy C-22 hydrochloric acid molybdenum nickel Ni-Fe-Cr-Mo non-aqueous organic solvent quinone transpassivity Hastelloy Alloy C...

...Shohei Iwao; Michihide Yoshino; Masakazu Edo; Shu Kuroda Dip and dry corrosion tests were carried out on Alloy A3003 (UNS A93003) using hydrochloric acid (HCl), acetic acid (CH₃COOH), and a mixed solution. After 50 corrosion test cycles with the HCl solution, pitting corrosion occurred...

...J. Zhang; X.-L. Gong; H.-H. Yu; M. Du The inhibitive effect on Q235 steel and the adsorption behavior of a compound inhibitor, including imidazoline phosphate (IPI) and potassium iodide (KI), were studied in 1 mol/L hydrochloric acid (HCl) solution using the weight-loss method, potentiodynamic...

... diffusivities. SCC at supercritical temperature comes from the direct chemical attack of associated hydrochloric acid (HCl) molecules. A test facility, which is illustrated in Figure 1 , was developed to test materials in the supercritical temperature and subcritical temperature ranges at a constant...

...A.R. Sathiya Priya; V.S. Muralidharan; A. Subramania The inhibitive action of 1-cinnamylidine-3-thiocarbohydrazide (CTCH) and 1,1ʹ-dicinnamylidine-3-thiocarbohydrazide (DCTCH) against the corrosion of carbon steel in 15% hydrochloric acid (HCl) was investigated using nonelectrochemical...

..., corrosion tests of the Ti-Pd alloy were conducted in 20% hydrochloric acid (HCl) with oxygen. Corrosion tests consisted of short-term tests to evaluate the temperature dependency for 1 h to 31 h, and long-term tests to evaluate stability for 82 h to 422 h. The Ti-Pd alloy had good corrosion resistance...

...C. Schroer; J. Konys; J. Novotny; J. Hausselt This paper gives an overview of investigations on the corrosion behavior of commercially available materials and nickel-chromium model alloys in chloride-containing, high-pressure aqueous solutions (mostly oxygenated, diluted hydrochloric acid [HCl...

... on the decomposition of chloroprene (C₄H₅Cl) and cation exchange resin, which generate hydrochloric acid (HCl) and sulfuric acid (H₂SO₄) in process fluids. In order to select candidate materials, short-period screening tests were carried out on various corrosion-resistant...

...S. S. Mahmoud Three pyrazole derivatives: 3(5) amino- 5(3) phenyl pyrazole (I), 3(5) amino- 5(3) [4- methyl phenyl] pyrazole (II), and 3(5) amino- 5(3) [4- methoxy phenyl] pyrazole (III) were synthesized and their corrosion inhibiting behavior for a copper-iron alloy in 1.0 M hydrochloric acid (HCl...

... to understand the localized corrosion behavior of Ta. All artificial pit electrode experiments were repeated at least twice. April 2004 November 2004 NACE International 2005 hydrochloric acid localized corrosion methanol pitting tantalum water Ta (UNS R05200) ⁽¹...

... with a zinc rod or in boiling hydrochloric acid (HCl). For three superduplex stainless steels, UNS S32750, UNS S32760, and UNS S32520, with similar chemistry except for their copper and tungsten content, the influence of the activation method was studied using general corrosion rate tests in HCl. The results...

...A. Popova; M. Christov; T. Deligeorgiev Six benzimidazole derivatives were investigated as corrosion inhibitors on mild steel in 1 M hydrochloric acid (HCl) using gravimetric and polarization techniques. Inhibitor efficiency was found to depend on concentration and on the structure of the molecules...

...Z. Misirlioğlu; A. Aksüt This study focuses on the corrosion of Mo in acidic media (sulfuric acid [H₂SO₄] and hydrochloric acid [HCl]). The effect of the electrode pretreatment was investigated by testing the electrode at different cathodic potentials. The effect of propargyl...

...T.N. Castro Dantas; E. Ferreira Moura; H. Scatena, Jr.; A.A. Dantas Neto The inhibition effect of surfactant systems on the corrosion of carbon steel (AISI 1010) by 0.1 M hydrochloric acid (HCl) was investigated by polarization measurement techniques. Dodecylammonium bromide (DDAB) surfactant...

..., and their influence on the inhibition of corrosion of mild steel in 1 N hydrochloric acid (HCl) and 1 N sulfuric acid (H₂SO₄) was investigated by weight loss and potentiodynamic polarization techniques. The inhibition efficiency of these compounds was found to vary with concentration...

...S. Maeng; L. Axe; T.A. Tyson The corrosion behavior of gun-barrel steel in 37.8% hydrochloric acid (HCl) at room temperature was investigated as a function of exposure time by several methods, including mass loss measurement, atomic absorption spectrometer (AAS), x-ray diffraction (XRD), scanning...

...M.A. Quraishi; N. Sardar; H. Ali Three new organic inhibitors, namely, dicinnamylidene acetone (DCA), disalicylidene acetone (DSA), and divanillidene acetone (DVA), were synthesized in the laboratory and their inhibiting action was studied on corrosion of N-80 alloy in boiling hydrochloric acid...

...A.A. Mazhar; S.T. Arab; E.A. Noor Two N-heterocyclic compounds were tested as inhibitors for the corrosion of an Al-11% Si alloy in hydrochloric acid (HCl) solutions by polarization and chemical measurements. Results indicated that Compound (B), containing a quinolinium moiety, was more effective...

...M.A. Quraishi; D. Jamal; R.N. Singh Selected thiosemicarbazides of fatty acids with C₁₁-C₁₈ carbon atoms were synthesized and evaluated as corrosion inhibitors of mild steel (MS) in 1 N hydrochloric acid (HCl) and 1 N sulfuric acid (H₂SO₄) by weight loss...