Testing Multiple Specimens of Stainless Steels in a Modified Boiling Nitric Acid Test Apparatus

2009 ◽  
pp. 211-211-6 ◽  
Author(s):  
W B De Long
Keyword(s):  
Nitric Acid ◽  
Stainless Steels ◽  
Test Apparatus ◽  
Acid Test

Effect of Heat Treatment, Composition and Microstructure on Corrosion of 18Cr-8Ni-Ti Stainless Steels in Acids

CORROSION ◽  
1964 ◽  
Vol 20 (2) ◽  
pp. 57t-72t ◽  
Author(s):  
MICHAEL A. STREICHER
Keyword(s):  
Heat Treatment ◽  
Sulfuric Acid ◽  
Nitric Acid ◽  
Stainless Steels ◽  
Sigma Phase ◽  
Ferric Sulfate ◽  
Intergranular Attack ◽  
Chromium Carbides ◽  
Aisi 321 ◽  
Acid Test

Abstract Titanium additions to 18Cr-8Ni steels can effectively eliminate susceptibility to intergranular attack associated with the precipitation of chromium carbides. However, these additions also drastically reduce the grain size of these steels and promote the formation of sigma phase. Both of these factors modify the behavior of titanium-stabilized steels in corrosive environments. A detailed investigation of the influence of heat treatment and microstructure on the corrosion resistance of four titanium-stabilized, AISI 321, heats is described. Incomplete stabilization of carbon by titanium leads to precipitation of chromium carbides on heating in the range of 800 F to 1600 F. This type of susceptibility is readily detected in the oxalic acid etch test, the nitric-hydrofluoric acid test, the copper sulfate-sulfuric acid test, the ferric sulfate-sulfuric acid test, and in the nitric acid test. A second type of susceptibility to intergranular attack is associated with the formation of sigma phase, which may precipitate in a sub-microscopic form during heating in the range of 1150 to 1550 F. It is detected only in the nitric acid test and, to a lesser extent, in the ferric sulfate-sulfuric acid test. The action of various acid solutions on titanium-stabilized stainless steels are compared by means of metallographic studies of microstructures and of progressive corrosion, and by measurements of weight loss and change in electrical resistance of corroding specimens. The data obtained are used to explain the action of acids on these steels and to recommend procedures for evaluation testing.

NSSMC-NAR-SN-1, SN-3, SN-5

Alloy Digest ◽  
2016 ◽  
Vol 65 (1) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Nitric Acid ◽  
Tensile Properties ◽  
Stainless Steels ◽  
Austenitic Stainless Steels

Abstract NSSMC-NAR-SN-1, SN-3, and SN-5 are austenitic stainless steels with corrosion resistance to nitric acid. The alloys can be abbreviated as NSSMC-NAR-SN-1: LC-17Cr-14Ni-4Si, NSSMC-NAR-SN-3: LC-11Cr-17Ni-6Si-Zr-Ti, and NSSMC-NAR-SN-5: LC-27Cr- 8Ni-Si-N. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming. Filing Code: SS-1237. Producer or source: Nippon Steel and Sumitomo Metal Corporation.

Pitting corrosion of stainless steels used in the production of weak nitric acid

1970 ◽  
Vol 6 (2) ◽  
pp. 137-139
Author(s):  
A. N. Kuzyukov ◽  
V. A. Borisenko ◽  
N. P. Pilyugina
Keyword(s):  
Nitric Acid ◽  
Pitting Corrosion ◽  
Stainless Steels

scholarly journals The effect of SO3-Ph-BTBP on stainless steel corrosion in nitric acid

Nukleonika ◽  
2015 ◽  
Vol 60 (4) ◽  
pp. 865-869
Author(s):  
Richard J. Wilbraham ◽  
Colin Boxall
Keyword(s):  
Stainless Steel ◽  
Nitric Acid ◽  
Stainless Steels ◽  
Steel Corrosion ◽  
Reductive Dissolution ◽  
Extraction Kinetics ◽  
Weak Absorption ◽  
Solution Interface ◽  
Nuclear Reprocessing ◽  
Kinetics Of

Abstract SO3-Ph-BTBP is a hydrophilic tetra-N-dentate ligand proposed for An(III)/Ln(III) separation by solvent extraction, and a candidate for use in future advanced reprocessing schemes such as GANEX and SANEX. We present the first study of the effect of SO3-Ph-BTBP on the corrosion behavior of stainless steels. Specifically, studies have been performed using steels and conditions equivalent to those found in relevant nuclear reprocessing flow sheets. SO3-Ph-BTBP has been shown to have little effect on either steel passivation or reductive dissolution. However, if driven cathodically into a region of hydrogen evolution at the electrode surface or conversely anodically into a region of transpassive dissolution, observed currents are reduced in the presence of SO3-Ph-BTBP, suggesting corrosion inhibition of the steel potentially through weak absorption of a SO3-Ph-BTBP layer at the metal-solution interface. The lack of any observed corrosion acceleration via complexation of Fe3+ is surprising and has been suggested to be due to the slow extraction kinetics of SO3-Ph-BTBP as a result of a requirement for a trans- to cis-conformational change before binding.

Corrosion Behavior of Type 304L Stainless Steels in Nitric Acid Containing Free and Complexed Fluoride

CORROSION ◽  
2012 ◽  
Vol 68 (2) ◽  
pp. 026002-1-026002-14 ◽  
Author(s):  
S. Sathe ◽  
V. Kain ◽  
K. Chandra
Keyword(s):  
Nitric Acid ◽  
Corrosion Behavior ◽  
Stainless Steels
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