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A study on the local corrosion behavior and mechanism of electroless Ni-P coatings under flow by using a wire beam electrode

Journal Article


Abstract


  • The local corrosion behavior and mechanism of Ni-P coatings in a 3.5 wt% sodium chloride solution with different flow speeds (0 m s-1, 0.5 m s-1, 1 m s-1) were investigated through a wire beam electrode (WBE) with morphological, elemental and electrochemical analyses as well as numerical simulations. It was found that the microstructure of the Ni-P coating was in the shape of broccoli and possessed satisfactory compactness and uniformity. The numerical simulations showed that the speed increased and the static pressure decreased at the local area. Combined with WBE, it was found that the average corrosion potential decreased at that area. The results indicated that the corrosion tendency and corrosion rate of the Ni-P coating were larger at higher speeds, and the corrosion resistance could be improved by the electroless Ni-P coating. WBE was helpful in revealing the local electrochemical information of the Ni-P coating.

Authors


  •   Tang, Yi¿Rong (external author)
  •   Wang, Qin-Ying (external author)
  •   Pei, Rui (external author)
  •   Xi, Yu-Chen (external author)
  •   Dong, Li-Jin (external author)
  •   Bai, Shu-Lin (external author)
  •   Wan, Shanhong

Publication Date


  • 2019

Citation


  • Tang, Y., Wang, Q., Pei, R., Xi, Y., Dong, L., Bai, S. & Wan, S. (2019). A study on the local corrosion behavior and mechanism of electroless Ni-P coatings under flow by using a wire beam electrode. RSC Advances: an international journal to further the chemical sciences, 9 (59), 34214-34226.

Scopus Eid


  • 2-s2.0-85074474302

Number Of Pages


  • 12

Start Page


  • 34214

End Page


  • 34226

Volume


  • 9

Issue


  • 59

Place Of Publication


  • United Kingdom

Abstract


  • The local corrosion behavior and mechanism of Ni-P coatings in a 3.5 wt% sodium chloride solution with different flow speeds (0 m s-1, 0.5 m s-1, 1 m s-1) were investigated through a wire beam electrode (WBE) with morphological, elemental and electrochemical analyses as well as numerical simulations. It was found that the microstructure of the Ni-P coating was in the shape of broccoli and possessed satisfactory compactness and uniformity. The numerical simulations showed that the speed increased and the static pressure decreased at the local area. Combined with WBE, it was found that the average corrosion potential decreased at that area. The results indicated that the corrosion tendency and corrosion rate of the Ni-P coating were larger at higher speeds, and the corrosion resistance could be improved by the electroless Ni-P coating. WBE was helpful in revealing the local electrochemical information of the Ni-P coating.

Authors


  •   Tang, Yi¿Rong (external author)
  •   Wang, Qin-Ying (external author)
  •   Pei, Rui (external author)
  •   Xi, Yu-Chen (external author)
  •   Dong, Li-Jin (external author)
  •   Bai, Shu-Lin (external author)
  •   Wan, Shanhong

Publication Date


  • 2019

Citation


  • Tang, Y., Wang, Q., Pei, R., Xi, Y., Dong, L., Bai, S. & Wan, S. (2019). A study on the local corrosion behavior and mechanism of electroless Ni-P coatings under flow by using a wire beam electrode. RSC Advances: an international journal to further the chemical sciences, 9 (59), 34214-34226.

Scopus Eid


  • 2-s2.0-85074474302

Number Of Pages


  • 12

Start Page


  • 34214

End Page


  • 34226

Volume


  • 9

Issue


  • 59

Place Of Publication


  • United Kingdom