Effect of chloride ions on corrosion behaviour of austenitic nickel and nickel free stainless steels in phosphoric acid solutions

被引：2
作者：
Tzaneva, B. R. [1 ]
Loukaycheva, M. H. [1 ]
Fachikov, L. B. [2 ]
Jekova, L. Ts. [3 ]
机构：
[1] Tech Univ Sofia, Sofia 1756, Bulgaria
[2] Univ Chem Technol & Met, Sofia 1756, Bulgaria
[3] Haydroaero Dynam Ctr BAS, Inst Met Sci Equipment & Technol Acad Balevsci, Sofia 1574, Bulgaria
来源：
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY | 2015年 / 50卷 / 08期
关键词：
Stainless steel; Nitrogen; Chloride; Pitting; Phosphoric acid; Polarisation; CR-MN-N; PITTING CORROSION; DIFFERENT TEMPERATURES; LOCALIZED CORROSION; CAST-IRON; NITROGEN; INHIBITION; PHOSPHATE; DUPLEX; ANIONS;
D O I：
10.1179/1743278215Y.0000000016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of chloride ions' presence (0.005-1.0M NaCl) in phosphoric acid solutions (5, 40 and 75%) on the corrosion behaviour of three austenitic stainless steels (an experimental steel Fe-18Cr-12Mn-0.6N and two trade grades, Fe-18Cr-9Ni and Fe-14Cr-15Mn-0.2N) has been studied by potentiodynamic polarisation measurements. The surface examinations of the samples tested involved X-ray photoelectron spectroscopy as well as optical and scanning electron microscopy. It was established that chlorides added to phosphoric acid solutions deteriorate the general corrosion resistance, and under anodic polarisation, they provoke pitting corrosion. The composition of the stainless steels significantly influences its corrosion behaviour in the phosphoric acid solutions containing chloride ions. The replacement of nickel with manganese and nitrogen on top of lower chromium content has a strong negative effect on the corrosion resistance.
引用
收藏
页码：568 / 578
页数：11
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