Deposition of electroless Ni–P graded coatings and evaluation of their corrosion resistance

Narayanan, T.S.N. Sankara; Baskaran, I.; Krishnaveni, K.; Parthiban, S.

doi:10.1016/j.surfcoat.2004.10.014

Cited by 173 publications

(64 citation statements)

References 25 publications

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“…The corrosion resistant property of EN makes it very useful as a protective coating, though all EN deposits do not behave the same way [12,13,14]. High phosphorus deposits are comparatively substandard to low phosphorus deposits in high temperature and strongly alkaline media but are more efficient in neutral or acidic media.…”

Section: Introductionmentioning

confidence: 99%

Corrosion of Heat Treated Electroless-Ni Plated Mild Carbon Steels in Dilute H2SO4

Ajibola

Adebayo

Oloruntoba

2015

IJMSA

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Abstract:The corrosion of heat-treated Electroless-Nickel (EN) plated mild carbon steel (MCS) in dilute H 2 SO 4 is investigated and reported in the study. The MCS samples were electroless-Ni plated in alkaline Nimudeen 850. EN plated samples were soaked at different selected temperatures between 150-370 °C at constant time. The weight loss of the specimens by full immersion method was employed to assess the corrosion damage and corrosion rates of the as-received, EN plated MCS and four heat treated EN plated samples in the 0.5 M H 2 SO 4 solution. The test specimens were regularly examined at every 12 hrs interval for 30 days (720 hrs). The materials corrodes in 0.5 M H 2 SO 4 in the order of MCS10 > MCS14 > MCS15 > MCS11 > MCS13 > MCS12. Based on the results obtained, it will be justified to choose EN-plated samples (MCS 11) and the heat treated EN film (MCS12 and MCS13) for the purposed of solving the problem of corrosion in the medium. This is because; the application of EN deposition reduced the corrosion of MCS at much lower rate than the heat-treated EN film (MCS14 and MCS15) in 0.5 M H 2 SO 4 environment. Atomic Absorption Spectrometer (AAS) Thermo series 2000 model and Scanning Electron Microscopy (SEM) with the Energy Dispersive X-Ray (EDX) facilities (Jeol JSM-7600F model) were used to ascertain the chemical compositions and the microstructures of samples.

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Section: Introductionmentioning

confidence: 99%

Corrosion of Heat Treated Electroless-Ni Plated Mild Carbon Steels in Dilute H2SO4

Ajibola

Adebayo

Oloruntoba

2015

IJMSA

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“…The cross-section of the EN-P coating annealed at 700°C, Fig. (5d), shows the formation of particles of Mn, Ni and P, as result of the direct reaction between the diffused Mn, Ni and P in the coating [22]. The diffusion depth of Ni into the Fe-25Mn steel can be detected and is shown by an arrow in Fig.…”

Section: Corrosion Resistancementioning

confidence: 94%

“…This can be attributed to the formation of Ni 3 P particles at such temperatures, which in turn reduces the P content of the remaining material. It is suggested that P is responsible for the formation of an adsorbed film of hypophosphite, which blocks the water molecules from interacting with Ni, thus inhibiting the oxidation of Ni [22]. Further, the presence of Ni 3 P particles creates active/passive corrosion cells, thus contributing detrimentally to the corrosion resistance of the coating.…”

Section: Corrosion Resistancementioning

confidence: 99%

Corrosion Behaviour of High-Mn TWIP Steels with Electroless Ni-P Coating

Hamada¹,

Karjalainen²

2010

TOCORRJ

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An attempt has been taken to improve the corrosion resistance of twinning-induced plasticity (TWIP) steels ) by electroless Ni-P coating. Corrosion resistance in 3.5% NaCl and 0.1M H 2 SO 4 solutions was characterized by the potentiodynamic polarization curves and Tafel method calculations. It was found that Ni-P coating improved the corrosion resistance by the factor of 4 and 40 in 3.5%NaCl and 0.1M H 2 SO 4 , respectively. Post-heat treatments, commonly used to increase hardness and wear resistance of Ni-P deposits, were found to reduce the corrosion resistance, even though the 1 h annealing at 700°C less than at 350°C. Also, the adhesion of the coating on the steels was impaired in annealing. The lowered corrosion resistance in annealing can be suggested to result from the crystallization of the amorphous coating and the formation of Ni 3 P particles, but at 700°C, the formation MnO layer on the top of the coating promoted the resistance by enhancing the passivation in the 3.5% NaCl solution.

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“…This situation is somewhat strange because people have been measuring a lot of the RAF in EP alloy coatings. In addition, as described in the above paragraph, either from the Table 1 Composition, structure and formation range of amorphous phases for nine EP alloy deposits [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] No. Experimental data Calculated results The reason for this problem is somewhat strange as said above, it is because the situation is different with that in the conventional amorphous alloys prepared by melt quenching (MQ) and mechanical alloying (MA) methods.…”

Section: Introductionmentioning

confidence: 99%

Calculating formation range of binary amorphous alloys fabricated by electroless plating

et al. 2016

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A lot of amorphous alloy deposits in the binary (Ni, Co, Cu)-(P, B) alloy systems fabricated by electroless plating (EP) have been reported up to date. But no one reported their theoretical modeling of the amorphous formation and calculated their concentration range of amorphous formation (RAF). Using Miedema model and subregular model scheme, the RAFs for the six EP (Ni, Co, Cu)-(P, B) alloys and three Ni-Cu, Ni-Co and Co-Cu alloys have been calculated systematically for the first time. The calculated results are in agreement with experimental observations. Experiments and calculations for the RAFs in the latter three alloy systems reveal that not any RAF formed except crystalline states. The huge difference between the six metal-metalloid alloys and three metalmetal alloys in RAF has been discussed in detail in the paper.

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Deposition of electroless Ni–P graded coatings and evaluation of their corrosion resistance

Cited by 173 publications

References 25 publications

Corrosion of Heat Treated Electroless-Ni Plated Mild Carbon Steels in Dilute H<sub>2</sub>SO<sub>4</sub>

Corrosion of Heat Treated Electroless-Ni Plated Mild Carbon Steels in Dilute H<sub>2</sub>SO<sub>4</sub>

Corrosion Behaviour of High-Mn TWIP Steels with Electroless Ni-P Coating

Calculating formation range of binary amorphous alloys fabricated by electroless plating

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Deposition of electroless Ni–P graded coatings and evaluation of their corrosion resistance

Cited by 173 publications

References 25 publications

Corrosion of Heat Treated Electroless-Ni Plated Mild Carbon Steels in Dilute H&lt;sub&gt;2&lt;/sub&gt;SO&lt;sub&gt;4&lt;/sub&gt;

Corrosion of Heat Treated Electroless-Ni Plated Mild Carbon Steels in Dilute H&lt;sub&gt;2&lt;/sub&gt;SO&lt;sub&gt;4&lt;/sub&gt;

Corrosion Behaviour of High-Mn TWIP Steels with Electroless Ni-P Coating

Calculating formation range of binary amorphous alloys fabricated by electroless plating

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Corrosion of Heat Treated Electroless-Ni Plated Mild Carbon Steels in Dilute H<sub>2</sub>SO<sub>4</sub>

Corrosion of Heat Treated Electroless-Ni Plated Mild Carbon Steels in Dilute H<sub>2</sub>SO<sub>4</sub>