Tailored surface energy of stainless steel plate coupons to reduce the adhesion of aluminium silicate deposit

Ratale Matjie (Lead / Corresponding author), Shuai Zhang (Lead / Corresponding author), Qi Zhao, Nhlanganiso Mabuza, John R. Bunt

Research output: Contribution to journalArticle

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Abstract

Fouling in heat exchangers not only reduces heat transfer performance significantly, but also causes considerable pressure drop, resulting in higher pumping requirements. It would be much more desirable if surfaces which are inherently less prone towards fouling could be developed. In this paper, autocatalytic Nickel-Phosphorus-Polytetrafluoroethylene (Ni-P-PTFE) composite coatings and modified diamond-like carbon (DLC) coatings were applied to the coupons of the 316L stainless steel plates. The effects of surface energies of the coatings on the adhesion of aluminium silicate fouling were investigated and the best surface energy for which the fouling adhesion is lowest was obtained. The experimental results show that the coating with the most favourable surface energy reduced the adhesion of aluminium silicate deposit by 97%, compared with uncoated stainless steel plate coupons. The anti-fouling mechanism of the coatings was explained with the extended Deryagin, Landau, Verwey and Overbeek (DLVO) theory.

Original languageEnglish
Pages (from-to)573-578
Number of pages6
JournalFuel
Volume181
Early online date13 May 2016
DOIs
Publication statusPublished - 1 Oct 2016

Fingerprint

Aluminum Silicates
Stainless Steel
Fouling
Interfacial energy
Silicates
Adhesion
Deposits
Stainless steel
Aluminum
Coatings
Diamond
Composite coatings
Polytetrafluoroethylene
Nickel
Polytetrafluoroethylenes
Phosphorus
Pressure drop
Heat exchangers
Diamonds
Carbon

Keywords

  • Aluminium silicate
  • DLC coating
  • Fouling
  • Ni-P-PTFE coating
  • Stainless steel
  • Surface energy

Cite this

Matjie, Ratale ; Zhang, Shuai ; Zhao, Qi ; Mabuza, Nhlanganiso ; Bunt, John R. / Tailored surface energy of stainless steel plate coupons to reduce the adhesion of aluminium silicate deposit. In: Fuel. 2016 ; Vol. 181. pp. 573-578.
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abstract = "Fouling in heat exchangers not only reduces heat transfer performance significantly, but also causes considerable pressure drop, resulting in higher pumping requirements. It would be much more desirable if surfaces which are inherently less prone towards fouling could be developed. In this paper, autocatalytic Nickel-Phosphorus-Polytetrafluoroethylene (Ni-P-PTFE) composite coatings and modified diamond-like carbon (DLC) coatings were applied to the coupons of the 316L stainless steel plates. The effects of surface energies of the coatings on the adhesion of aluminium silicate fouling were investigated and the best surface energy for which the fouling adhesion is lowest was obtained. The experimental results show that the coating with the most favourable surface energy reduced the adhesion of aluminium silicate deposit by 97{\%}, compared with uncoated stainless steel plate coupons. The anti-fouling mechanism of the coatings was explained with the extended Deryagin, Landau, Verwey and Overbeek (DLVO) theory.",
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Tailored surface energy of stainless steel plate coupons to reduce the adhesion of aluminium silicate deposit. / Matjie, Ratale (Lead / Corresponding author); Zhang, Shuai (Lead / Corresponding author); Zhao, Qi; Mabuza, Nhlanganiso; Bunt, John R.

In: Fuel, Vol. 181, 01.10.2016, p. 573-578.

Research output: Contribution to journalArticle

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AU - Zhao, Qi

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AU - Bunt, John R.

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Y1 - 2016/10/1

N2 - Fouling in heat exchangers not only reduces heat transfer performance significantly, but also causes considerable pressure drop, resulting in higher pumping requirements. It would be much more desirable if surfaces which are inherently less prone towards fouling could be developed. In this paper, autocatalytic Nickel-Phosphorus-Polytetrafluoroethylene (Ni-P-PTFE) composite coatings and modified diamond-like carbon (DLC) coatings were applied to the coupons of the 316L stainless steel plates. The effects of surface energies of the coatings on the adhesion of aluminium silicate fouling were investigated and the best surface energy for which the fouling adhesion is lowest was obtained. The experimental results show that the coating with the most favourable surface energy reduced the adhesion of aluminium silicate deposit by 97%, compared with uncoated stainless steel plate coupons. The anti-fouling mechanism of the coatings was explained with the extended Deryagin, Landau, Verwey and Overbeek (DLVO) theory.

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