Improving corrosion resistance of reinforcement steel rebars exposed to sulphate attack by the use of electroless nickel coatings

Mukhopadhyay, Arkadeb; Sahoo, Sarmila

doi:10.1080/19648189.2021.1886177

Cited by 13 publications

(6 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They have opined that double enamel coatings exhibit the lowest passive current density and thereby achieving the highest corrosion resistance than the other three rebars [22][23][24]. A similar study by Yan et al has reported that the use of enamel coatings can also enhance the bond strength between the steel and the mortar [23][24][25]. Tang et al has also reported that epoxy coatings are more corrosion resistant than enamel coatings [26].…”

Section: Introductionmentioning

confidence: 97%

“…Tang et al has also reported that epoxy coatings are more corrosion resistant than enamel coatings [26]. It has been reported earlier that Ni-P-W and Ni-P-Cu coated rebars can effectively prevent sulphate attacks [23,24]. Recently Sharma et al has reported that modified ECRs with nano clay can effectively resist corrosion initiation by delaying the breakdown of the passive layer on the rebar [27].…”

Section: Introductionmentioning

confidence: 98%

“…However, it cannot be overruled that the application of suitable coatings on rebars can significantly improve corrosion resistance. Tang et al has investigated the passive current density (EIS) for uncoated, pure, double, and mixed enamel-coated steel rebars in 3.5% NaCl solution [22][23][24]. They have opined that double enamel coatings exhibit the lowest passive current density and thereby achieving the highest corrosion resistance than the other three rebars [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…Tang et al has investigated the passive current density (EIS) for uncoated, pure, double, and mixed enamel-coated steel rebars in 3.5% NaCl solution [22][23][24]. They have opined that double enamel coatings exhibit the lowest passive current density and thereby achieving the highest corrosion resistance than the other three rebars [22][23][24]. A similar study by Yan et al has reported that the use of enamel coatings can also enhance the bond strength between the steel and the mortar [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A comparative study on the microstructure, hardness and corrosion resistance of epoxy coated and plain rebars

Yadav¹,

Dey²,

Ghosh³

2022

Mater. Res. Express

View full text Add to dashboard Cite

Corrosion of steel rebars and susceptibility of reinforcement steel to chloride ion attacks are the two major problems for the construction industries and thereby a huge amount of money is spent to repair it. Epoxy coating on the steel rebars can be one cost-effective solution to alleviate the detrimental effects of corrosion in concrete structures. In the present research, plain and epoxy coated rebar (ECR) samples were chosen to study the correlation between microstructure, hardness and corrosion performance. The microstructures of the investigated thermomechanically treated (TMT) rebars primarily reveal tempered martensitic rings at the outer surface followed by a narrow bainitic transition zone in between along with a ferrite-pearlite microstructure at the inner core. The corrosion resistance of plain and epoxy-coated rebars in naturally aerated 3.5% NaCl and 1% HCl solutions were studied using gravimetric test, open circuit potential (OCP) test, and linear polarization monitoring techniques. It has been witnessed that the corrosion current (icorr) has been shifted towards lower values and polarization resistance (Rp) values are higher for ECR samples which is a clear indication of higher corrosion resistance of the ECRs than the plain rebars. Energy dispersive spectroscopy (EDS) analysis reveals the presence of iron hydroxides and iron oxides. However, X-Ray diffraction (XRD) analysis indicates the existence of various types of oxides, hydroxides, and oxy-hydroxides like iron chloride hydroxide [Fe2(OH)3Cl], goethite (α-FeO(OH)), lepidocrocite (γ-FeO(OH)), magnetite (Fe3O4) and bernalite [Fe(OH)3(H2O)0.25] in the epoxy coated rebar samples whereas, plain rebars indicate the presence of goethite (α-FeO(OH)), maghemite (γ-Fe2O3), magnetite (Fe3O4), hydrogoethite (Fe2O3.H2O), lepidocrocite (γ-FeO(OH)) and iron oxide (Fe21.34O32). All the experimental results confirm that ECR samples are more corrosion resistant under both acidic and saline environments.

show abstract

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A comparative study on the microstructure, hardness and corrosion resistance of epoxy coated and plain rebars

Yadav¹,

Dey²,

Ghosh³

2022

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…Several electrochemical investigations were conducted to investigate the corrosion behaviour of AISI 1040 steel 24 and particularly austenitic grade steel. 25,26 The corrosion in various media was investigated in a quest to mitigate surface damage, dimensional changes and improve service life of machine components and structures. 27,28 The use of ML and non-traditional optimization approaches to enhance corrosion resistance has been well documented by Coelho et al.…”

Section: Introductionmentioning

confidence: 99%

The use of machine learning and metaheuristic algorithm for wear performance optimization of AISI 1040 steel and investigation of corrosion resistance

Agrawal

Mukhopadhyay

2022

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

AISI 1040 steel offers a wide range of industrial applications due to its mechanical characteristics and applicability. The present work investigates the wear performance of AISI 1040 steel under dry sliding conditions and its optimization using combined machine learning (ML) and metaheuristic algorithm. Sliding wear test were carried out on a pin-on-disc tribometer by varying the load (10–100 N), sliding speed (0.5–1.5 m/s) and sliding distance (400–1000 m). The test parameters were varied at three levels. Experiments were carried out following combinations in Taguchi's L27 orthogonal array (OA). Artificial neural network (ANN) was used to model the process parameters with wear rate. The trained network was optimized using genetic algorithm (GA) to predict optimal wear rate. This methodology has been termed as ANN-GA method. The results were compared with conventional Taguchi based and regression based GA optimization. A significant reduction in the wear rate could be realized due to optimization using ANN-GA method. This work also examined the corrosion behaviour of AISI 1040 steel exposed to 3.5% NaCl, 3.5% NaOH, 0.5 M H2SO4 and 3.5% NaCl + 0.5 M H2SO4 to simulate various corrosive environments encountered in industrial applications. A nobler corrosion potential was obtained in 3.5% NaOH. Investigations of corroded samples showed pitting corrosion in 3.5% NaCl, 0.5 M H2SO4 as well as combined chloride and sulphate attack. On the other hand, negligible corrosion was observed in 3.5% NaOH.

show abstract

Tribological Characterization of Electroless Nickel Coatings at High Temperatures

Mukhopadhyay,

Barman,

Sahoo

2023

Engineering Materials

View full text Add to dashboard Cite

Improving corrosion resistance of reinforcement steel rebars exposed to sulphate attack by the use of electroless nickel coatings

Cited by 13 publications

References 52 publications

A comparative study on the microstructure, hardness and corrosion resistance of epoxy coated and plain rebars

A comparative study on the microstructure, hardness and corrosion resistance of epoxy coated and plain rebars

The use of machine learning and metaheuristic algorithm for wear performance optimization of AISI 1040 steel and investigation of corrosion resistance

Tribological Characterization of Electroless Nickel Coatings at High Temperatures

Contact Info

Product

Resources

About