AMechanistic Study on Semiconductivity Conversion of Passive Films under Varying Sulfate to Chloride Concentration Ratios

Xia, Da-Hai; Li-xia, Yang

doi:10.3866/pku.whxb201405211

Cited by 9 publications

(1 citation statement)

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“…The location where corrosion most possibly occurs is the crevice which is usually located between the tube-to-tube sheet (TTS) and tube-to-support plate (TSP) or under deposits (including tubesheet sludge piles and thick freespan deposits) [7][8][9][10]. Some impurities, such as sulphate, chloride ions in the secondary side, can concentrate within the crevice.…”

Section: Introductionmentioning

confidence: 99%

Passivation degradation of Alloy 800 on nucleate boiling surface

Xia

Zhou

Wang

et al. 2017

Corrosion Engineering, Science and Technology

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In this work, the passivation degradation of Alloy 800 on nucleate boiling surface was studied by using polarisation curve, electrochemical impedance spectroscopy and secondary ion mass spectrometry. Experimental results indicated that boiling bubble would significantly degrade the passive film, as indicated by a decreased pitting potential and increased passive current density. Under boiling condition, the mass transfer of electrolyte is accelerated and the temperature of Alloy 800 was increased, as a result, the cathodic reaction and the dissolution rate of the passive film were increased. The passive film was Cr-depleted but Ni-and Fe-enriched, and the decreased Cr content in the passive film led to a degraded passive film.

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Section: Introductionmentioning

confidence: 99%