Evaluation of 304 Stainless Steel Corrosion in Sulfuric Acid and Ethanol Media

The protective polymolecular layers formed on the surface of 12Kh18N10T chromium-nickel stainless steel in a solution of sulfuric acid with IFKhAN-92 (a triazole derivative) added is shown to have the protective afteraction in the same acid. The effectiveness of the protective afteraction of mixtures containing IFKhAN-92 is determined by the time of preliminary adsorption of the inhibitor, its concentration in the solution of preliminary adsorption, the temperatures of the solution of preliminary adsorption of the inhibitor and the background acid solution. The layers formed on steel by the IFKhAN-92 + KNCS and IFKhAN-92 + KI compositions have the highest protective afteraction. These layers protect steel at 80 °С in the background 2 M H2SO4. An increase in temperature of the solutions of preliminary adsorption of inhibitors enhances their protective afteraction, which indicates chemical nature of the interaction of the inhibitor molecules with the steel surface. The composition and the structure of the protective layers formed on the steel surface was studied by XPS analysis. The protective layer is chemically bonded to the phase of hydroxides and oxides of Fe, Cr and Ni, adjacent to the metallic phase. The lower part of the protective polymolecular layer of the organic inhibitor consists of a polymer complex formed by molecules of IFKhAN-92 and metal cations (Fe, Cr and Ni). The outer part of the protective organic layer consists of physically adsorbed molecules IFKhAN-92, easily removed from the metal surface during ultrasonic washing of samples.

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Study on the Complex of Sodium Tungstate and Urotropine as Inhibitors against Stainless Steel Corrosion in the NaCl Solution

Materials Science Forum ◽

10.4028/www.scientific.net/msf.689.450 ◽

2011 ◽

Vol 689 ◽

pp. 450-454 ◽

Cited By ~ 3

Author(s):

Qiang Song ◽

Xing Qi Qiu

Keyword(s):

Stainless Steel ◽

Sodium Tungstate ◽

Total Concentration ◽

Steel Corrosion ◽

Inhibitory Effect ◽

304 Stainless Steel ◽

Nacl Solution ◽

Weight Loss Method ◽

Synergistic Inhibitory Effect ◽

Loss Method

The corrosion weight loss method and polarization curve measurement were conducted to study the effects of the complex inhibitor of sodium tungstate and urotropine on the corrosion of 304 stainless steel in the 3.5% NaCl solution. The results indicated that the complex inhibitor has good synergistic inhibitory effect for stainless steel in the NaCl solution. Combining sodium tungstate and urotrpine at a total concentration of 500 mg/L, when the mass ratio of sodium tungstate to urotrpine was 7:3, the inhibitory effect was optimum. In addition, the probable inhibitory mechanism was analyzed.

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Effect of Sulfuric Acid, Oxygen, and Hydrogen in High Temperature Water on Stress Corrosion Cracking of Sensitized AISI 304 Stainless Steel

CORROSION ◽

10.5006/1.3593887 ◽

1984 ◽

Vol 40 (10) ◽

pp. 518-527 ◽

Cited By ~ 16

Author(s):

W. E. Ruther ◽

W. K. Soppet ◽

G. Ayrault ◽

T. F. Kassner

Keyword(s):

Stainless Steel ◽

Sulfuric Acid ◽

High Temperature ◽

Stress Corrosion ◽

Stress Corrosion Cracking ◽

304 Stainless Steel ◽

Aisi 304 Stainless Steel ◽

Aisi 304 ◽

High Temperature Water ◽

Temperature Water

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Tribocorrosion Behavior of 304 Stainless Steel in 0.5 mol/L Sulfuric Acid

Acta Metallurgica Sinica (English Letters) ◽

10.1007/s40195-018-0773-x ◽

2018 ◽

Vol 31 (10) ◽

pp. 1049-1058 ◽

Cited By ~ 1

Author(s):

Ming Liu ◽

De-Li Duan ◽

Sheng-Li Jiang ◽

Ming-Yang Li ◽

Shu Li

Keyword(s):

Stainless Steel ◽

Sulfuric Acid ◽

304 Stainless Steel

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Pt-Based Catalytic Microcombustor for Micropower Generation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.699.635 ◽

2014 ◽

Vol 699 ◽

pp. 635-641

Author(s):

Nazri Murat Muhamad ◽

Azman Miskam Muhamad ◽

Ahmad Mohd Azmier ◽

Zainal Alimuddin Zainal Alauddin ◽

Zulfikar Ishak Mohammad

Keyword(s):

Stainless Steel ◽

Sulfuric Acid ◽

Acid Solution ◽

Sulfuric Acid Solution ◽

Steel Surface ◽

Treatment Time ◽

Platinum Catalyst ◽

304 Stainless Steel ◽

Stainless Steel Surface ◽

Impregnation Method

This paper presents the fabrication and characterization of platinum-based catalytic microcombustor. The platinum catalyst was deposited onto type-304 stainless steel using the wet impregnation method. The stainless steel undergoes controlled conversion coating treatment in sulfuric acid solution to increase the porosity of its surface before the deposition of the platinum catalyst. The scanning electron microscopy result showed that the porosity on the stainless steel surface will depend on the length of treatment time in the sulfuric acid solution. The surface porosity increased as the treatment time increases. The stainless steel surface morphology changed from smooth to ‘cracked-mud’ morphology after treatment in sulfuric acid solution. The treatment time also provide significant effect to the amount of platinum deposited on the stainless steel surface. The energy dispersive x-ray analysis showed that the amount of deposited platinum for 10 seconds of treatment time was 0.68 wt%, whereas those for 20 and 30 seconds were 0.87 wt% and 1.10 wt%, respectively. Liquefied petroleum gas-air combustion result showed that the flame completely submerged inside the microcombustor with a catalyst, whereas portions of flame can be observed at the exhaust for the microcombustor without a catalyst. The minimum air-to-fuel ratios before the combustion blow-out for 10, 20, and 30 seconds of treatment time was 0.5, 0.4, and 0.3 respectively.

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