Role of magnesium ions in reducing high temperature aqueous corrosion of carbon steel

Subramanian, Hariharan; Subramanian, Veena; Chandramohan, P.; Srinivasan, M.; Rangarajan, S.; Narasimhan, S.V.; Velmurugan, S.

doi:10.1016/j.corsci.2013.01.021

Cited by 10 publications

(4 citation statements)

References 40 publications

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“…According to the standard binding energy, the corrosion layer of the N80 steal consisted of Fe 3 O 4 , Fe 2 O 3 , and FeOOH. The corrosion scale formed on N80steel was mainly composed of Fe 3+ oxide because of the existence of oxygen [15][16][17]. Fig.7 shows the XPS result of Ni-W-P alloy plating on the N80steel.…”

Section: ) Analysis Of Corrosion Productmentioning

confidence: 99%

Corrossion Behavior of Ni-W-P Coating in Hypersaline Brine

Shao¹,

Zhang²,

Cui³

et al. 2015

Proceedings of the 2015 Asia-Pacific Energy Equipment Engineering Research Conference

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To improve the corrosion resistance of N80steel, Ni-W-P coating was prepared by electroless deposition. The corrosion properties for Ni-W-P coating were investigated in hypersaline ground brine. Results of weight loss tests show that the corrosion resistance of the Ni-W-P coating is 10 times of N80steel in hypersaline brine at 90 °C. Electrochemical tests show that the current density of Ni-W-P coated sample reduce from 7.94×10-2 μA/cm 2 to 4.28×10-3 μA/cm 2 , and the corrosion potential changes from-0.700 V to-0.398 V compared with N80steel. Scanning electron microscopy (SEM) micrographs and X-ray photoelectron spectroscopy (XPS) were used to evaluate the morphology and composition of the corrosion layer of Ni-W-P coating. The results show that severe intergranular corrosion appear in N80steel, whereas no intergranular corrosion occur in Ni-W-P coating. The chemical composition of the corrosion layer of Ni-W-P coating is NiO,WO 3 , phosphate, and hypophosphite which led to superior corrosion resistance in hypersaline brine. This study confirms that the Ni-W-P coating can be applied for corrosion protection in hypersaline environment.

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Section: ) Analysis Of Corrosion Productmentioning

confidence: 99%

Corrossion Behavior of Ni-W-P Coating in Hypersaline Brine

Shao¹,

Zhang²,

Cui³

et al. 2015

Proceedings of the 2015 Asia-Pacific Energy Equipment Engineering Research Conference

View full text Add to dashboard Cite

show abstract

“…Most of the PHT piping and feeder pipes and related reactor designs are fabricated from carbon steel (CS), ASTM A106 Gr-B or ASTM A 333 Gr-6. [1][2][3][4][5][6] In nuclear power plants, water chemistry of the coolant is carefully monitored and controlled for the integrity of the system structure. 7,8 Although CANDU design is signicantly different from that of light water reactors (LWR), many materials corrosion and degradation issues are equally important and directly affect the safety of reactor operation.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, to reduce the corrosion of carbon steel and prevent local deposition of corrosion products, an alkaline pH 25 C of 10.2-10.6 is maintained by the addition of lithium hydroxide (LiOH) in the reactor primary circuit. 4,[9][10][11] It has been reported that the composition and grain boundaries of alloys could be modied to improve their corrosion resistance. 12 Zinc injection technology has been widely used in the primary circuit coolant of nuclear power plants.…”

Section: Introductionmentioning

confidence: 99%