Pitting corrosion testing

Wilde, B. E. and Williams, E., On the Correspondence Between Electrochemical and Chemical Accelerated Pitting Corrosion Tests , J. Electrochem. Soc., 117, 775 (1970)... 

Recommended practice for examination and evaluation of pitting corrosion Test method for determining susceptibility to stress corrosion cracking of high-strength aluminium alloy products Test method for pitting and crevice corrosion resistance of stainless steels and related alloys by the use of ferric chloride solution Recommended practice for preparation and use of direct tension stress corrosion test specimens... 

T.M. Devine and B.J. Drummond, Use of Accelerated Intergranular Corrosion Tests and Pitting Corrosion Tests to Detect Sensitization and Susceptibility to Intergranular Stress Corrosion Cracking in High Temperature Water of Duplex 308 Stainless Steel, Corrosion, Vol 37, 1981, p 104-115... 

These specimens are taken from the test series 2 and 1 (with pre-treatment of specimens) of the crevice and pitting corrosion tests in accordance with ASTM G-48. 

B.E. WHde, E. Williams, On the correspondence between electrochemical and chemical accelerated pitting corrosion tests, J. Electrochem. Soc. 117 (1970) 775—779. 

R. Qvarfort, New Electrochemical Cell for Pitting Corrosion Testing, Corrosion Science 28 (1988), pp. 135-140. 

Use of Accelerated Intergranular Corrosion Tests and Pitting Corrosion Tests to Detect Sensitisation and Susceptibility to Intergranular Stress Corrosion Cracking in High-Temperature Water... 

Depth of localized corrosion should be reported for the actual test period and not interpolated or extrapolated to an annual rate. The rate of initiation or propagation of pits is seldom uniform. The size, shape, and distribution or pits should oe noted. A distinction should be made between those occurring underneath the supporting devices (concentration cells) and those on the surfaces that were freely exposed to the test solution. An excellent discussion of pitting corrosion has been pubhshed [Corro.sion, 25t (January 1950)]. 

Obrecht, M. F., Sastor, W. E. and Keyes, J. M., Integrated Design of Field Test Panel Pilot Unit for Investigating Pitting Corrosion of Copper Water Tube by Potable Water Supplies , Proc. 4th Int. Congr. Met. Corr., 1969, 576 (1972)... 

Takenori, N., Norio, S., Tatsuo, 1. and Okamoto, G., Electrochemical Test for Pitting Corrosion in Stainless Steels , Hakkaido Daigaku Kogakubu Kenkyu Hokoku, 44, 1 (1967) C.A., 70, 16534h... 

Herbsleb, G. and Schwenk, W., Flow Dependence of the Pitting Corrosion of Cr-Ni Steel in NaCl Solution. 2 Tests with Ultrasonics , Werkst. Korros., 24, 267 (1973) C.A., 79, 56638n El Din Shams, A. M., Bodran, M. M. and Khalil, S. E., Corrosion Behaviour of Manganese-containing Stainless Steel. 3 Their Susceptibility Towards Pitting Corrosion , Werkst. Korros., 24, 290 (1973) C.A., 79, 56642j... 

While the pitting potential of a steel is not an absolute value, provided that test conditions are strictly standardised, it can be used to compare relative resistances to pitting corrosion initiation of steels and to determine the effects... 

Table 3.23 Effect of seawater velocity on pitting corrosion of 316S3I. Tests for 3 /z years...

The significance of the corrosion potential in relation to the equilibrium potentials and kinetics of anodic and cathodic reactions has been considered in Section 1.4, but it is appropriate here to give some examples of its use in corrosion testing. Pourbaix has provided a survey of potential measurements in relation to the thermodynamics and kinetics of corrosion, and an example of how they can be used to assess the pitting propensity of copper in Brussels water is given in Section 1.6. 

The extent of pitting is estimated by a special microscopical technique, or by the attack on the substrate using an appropriate indicator. Thus in the case of steel 1,10-phenanthroline hydrochloride is added to the electrolyte (solution B) to detect the formation of Fe ions. Alternatively, the specimens can be removed from the corrosion test solution and placed in an indicator solution, i.e. solution C for zinc-base die castings and solution D for steels. 

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