THE EFFECT OF PHOSPHATES ON THE SUSCEPTIBILITY OF ALPHA-BRASS TO STRESS-CORROSION CRACKING IN SODIUM-NITRITE

Authors
ASHOUR EA ATEYA BG
Citation
Ea. Ashour et Bg. Ateya, THE EFFECT OF PHOSPHATES ON THE SUSCEPTIBILITY OF ALPHA-BRASS TO STRESS-CORROSION CRACKING IN SODIUM-NITRITE, Corrosion science, 37(3), 1995, pp. 371-380
Citations number
31
Categorie Soggetti
Metallurgy & Metallurigical Engineering
Journal title
Corrosion science → ACNP
ISSN journal
0010938X
Volume
37
Issue
3
Year of publication
1995
Pages
371 - 380
Database
ISI
SICI code
0010-938X(1995)37:3<371:TEOPOT>2.0.ZU;2-7
Abstract
Di-sodiumhydrogenphosphate (DSHP) inhibits the stress corrosion cracki ng (SCC) of alpha-brass in 0.1 M NaNO2. It increases the maximum stres s and the time to failure at failure in slow strain-rate tests. It als o changes the mode of failure to ductile failure in the presence of mo derate concentrations. The results are complemented by some electroche mical measurements. The inhibiting effect of DSHP is attributed to the formation of zinc phosphate on the surface of the alloy which inhibit s dezincification and subsequently the SCC of the brass.