Electrochemical and XPS studies on corrosion behaviours of AISI 304 and AISI 316 stainless steels under plastic deformation in sulphuric acid solution

2011 ◽  
Vol 44 (5) ◽  
pp. 505-512 ◽  
Author(s):  
W. Y. Lai ◽  
W. Z. Zhao ◽  
Z. F. Yin ◽  
J. Zhang
Keyword(s):  
Plastic Deformation ◽  
Acid Solution ◽  
Sulphuric Acid ◽  
Stainless Steels ◽  
Sulphuric Acid Solution ◽  
Aisi 304 ◽  
Aisi 316

Development and Research of Copper Covering for Intensification of Cold Stamping of Products from Stainless Steels

2021 ◽  
Vol 316 ◽  
pp. 809-813
Author(s):  
Vladimir V. Karzhavin ◽  
Lev V. Maltsev ◽  
Viktoriya V. Bakina
Keyword(s):  
High Temperature ◽  
Acid Solution ◽  
Sulphuric Acid ◽  
Stainless Steels ◽  
Diffusion Zone ◽  
Pure Copper ◽  
Sulphuric Acid Solution ◽  
Fused Salts ◽  
Substitution Type ◽  
Cold Stamping

The copper covering put in fused salts of chlorides at temperature of 450-500cC and preventing scuffs on the surface of steel of type 12X18H10T at cold stamping of case products and fixture was investigated. Metallurgical surveys have shown: 1) except cover zone and zone of base metal there is also transition zone, representing substitution type of solution; 2) in the course of application there is superficial alloying, due to penetration of atoms of copper deep into metal and diffusions of doping steel elements in coating material under the influence of melts's high temperature. The schedule of change of concentration of copper in diffusion zone allows to conclude that the copper covering consists not of pure copper, and that the alloy contains only 94% of copper; other 6% represent the chrome and the titanium diffusing in copper covering. It is established also that, despite strong cohesion with basis, the covering is completely removed from surface of the stamping details being dissolved in standard sulphuric acid solution.

Effect of hydride formation on corrosion behaviour of Zr–1%Nb alloy in sulphuric acid solution

2016 ◽  
Vol 51 (3) ◽  
pp. 195-200 ◽  
Author(s):  
I. M. Gharatloo ◽  
A. N. Golikand ◽  
M. B. Fathi ◽  
R. S. Gharabagh ◽  
I. Hasanzadeh
Keyword(s):  
Acid Solution ◽  
Sulphuric Acid ◽  
Corrosion Behaviour ◽  
Sulphuric Acid Solution ◽  
Hydride Formation

Influence of chelating agents on the tribocorrosion of tungsten in sulphuric acid solution

2011 ◽  
Vol 56 (20) ◽  
pp. 7131-7140 ◽  
Author(s):  
J. Stojadinovic ◽  
D. Bouvet ◽  
M. Declercq ◽  
S. Mischler
Keyword(s):  
Acid Solution ◽  
Sulphuric Acid ◽  
Chelating Agents ◽  
Sulphuric Acid Solution

scholarly journals Breakdown and Evolution of the Protective Oxide Scales of AISI 304 and AISI 316 Stainless Steels under High-Temperature Oxidation

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
K. A. Habib ◽  
M. S. Damra ◽  
J. J. Saura ◽  
I. Cervera ◽  
J. Bellés
Keyword(s):  
Stainless Steel ◽  
Stainless Steels ◽  
Breakdown Point ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Protective Oxide ◽  
Aisi 304 ◽  
316 Stainless Steel ◽  
Aisi 316 Stainless Steel ◽  
Aisi 316

The failure of the protective oxide scales of AISI 304 and AISI 316 stainless steels has been studied and compared at 1,000°C in synthetic air. First, the isothermal thermogravimetric curves of both stainless steels were plotted to determine the time needed to reach the breakdown point. The different resistance of each stainless steel was interpreted on the basis of the nature of the crystalline phases formed, the morphology, and the surface structure as well as the cross-section structure of the oxidation products. The weight gain of AISI 304 stainless steel was about 8 times greater than that of AISI 316 stainless steel, and AISI 316 stainless steel reached the breakdown point about 40 times more slowly than AISI 304 stainless steel. In both stainless steels, reaching the breakdown point meant the loss of the protective oxide scale of Cr2O3, but whereas in AISI 304 stainless steel the Cr2O3scale totally disappeared and exclusively Fe2O3was formed, in AISI 316 stainless steel some Cr2O3persisted and Fe3O4was mainly formed, which means that AISI 316 stainless steel is more resistant to oxidation after the breakdown.

Sign in / Sign up

Export Citation Format

Share Document