Chemical Conversion Coatings on Magnesium Alloys - A Comparative Study

Shashikala, A. R.; Umarani, R.; Mayanna, S. M.; Sharma, Anand

doi:10.1016/s1452-3981(23)15498-8

Cited by 43 publications

(2 citation statements)

References 14 publications

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“…5a and 5b respectively for alkaline and acidic medium. Increase in the semicircle diameter of the specimen indicates higher impedance values as observed in case of composite coating [50]. The Bode plots of bare aluminium alloy, binary Ni-P as well as Ni-P/nano c-BN in acidic and alkaline media is provided in Figure 6 and 7.…”

Section: Potentiodynamic Polarization Studiesmentioning

confidence: 88%

Electrochemical investigations of Ni-P/nano c-BN deposited on aluminum alloy

Aarudi Ranganath,

Kothakula,

Bangarpet Shankar

2024

Zas Mat

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Electrochemical investigations were carried out on the Ni-P/nano cubic-Boron Nitride (c-BN) coatings obtained by using sodium hypophosphite reduced electrolyte bath solution with complexing agents. The screening of complexing agents was carried out by UV-Visible spectrophotometric studies. The deposits obtained using optimized bath composition was tested by EDAX, SEM and XRD in order to understand the structural morphology of the coatings. Electrochemical studies conducted by Potentiodynamic polarization and Electrochemical Impedance Spectroscopy (EIS) reveled the greater stability of coatings in acidic and alkaline environment. To evaluate the behavior of the coatings in marine environment, Salt spray test was conducted using sodium chloride solution. Results indicate the improved resistance to corrosion with the incorporation of nano c-BN in the coatings.

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Section: Potentiodynamic Polarization Studiesmentioning

confidence: 88%

Electrochemical investigations of Ni-P/nano c-BN deposited on aluminum alloy

Aarudi Ranganath,

Kothakula,

Bangarpet Shankar

2024

Zas Mat

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“…4 As hexavalent chromium affects the environment severely, a search for a chromate free substitute is initiated. 5 To date, a number of possible alternative coatings, namely, phosphates, 3 cerates, 6 Alodine, 7 Keronite 8 and Anomag, 9 are reported.…”

Section: Introductionmentioning

confidence: 99%

Studies on chrome free galvanic conversion coating on magnesium alloy AZ31B for space applications

Parida

Rani

Sharma

2010

Surface Engineering

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A novel galvanic conversion coating was studied on magnesium alloy AZ31B in an electrolyte system consisting of ammonium molybdate and magnesium chloride. The conditions of the conversion coating process and the characteristic of the coatings are studied in detail. The coatings were characterised by energy dispersive X-ray, infrared spectral and scanning electron microscopy studies. The thermoanalytical investigations have been carried out using thermogravimetry (TG), derivative thermogravimetry (DTG) and differential scanning calorimetry (DSC). The space worthiness of the coating was evaluated by environmental tests, namely, humidity, thermal cycling, thermovacuum performance and thermal stability tests. Optical properties (solar absorptance and infrared emittance) were measured before and after each environmental test to ascertain its stability. The coating provides higher solar absorptance and infrared emittance in the order of y0?80. The developed procedure is simple, ecofriendly and economically viable.

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Effect of Sn⁴⁺Additives on the Microstructure and Corrosion Resistance of Anodic Coating Formed on AZ31 Magnesium Alloy in Alkaline Solution

Salman¹,

Kuroda²,

Saito³

et al. 2012

Magnesium Technology 2012

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Chemical Conversion Coatings on Magnesium Alloys - A Comparative Study

Cited by 43 publications

References 14 publications

Electrochemical investigations of Ni-P/nano c-BN deposited on aluminum alloy

Electrochemical investigations of Ni-P/nano c-BN deposited on aluminum alloy

Studies on chrome free galvanic conversion coating on magnesium alloy AZ31B for space applications

Effect of Sn⁴⁺Additives on the Microstructure and Corrosion Resistance of Anodic Coating Formed on AZ31 Magnesium Alloy in Alkaline Solution

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Chemical Conversion Coatings on Magnesium Alloys - A Comparative Study

Cited by 43 publications

References 14 publications

Electrochemical investigations of Ni-P/nano c-BN deposited on aluminum alloy

Electrochemical investigations of Ni-P/nano c-BN deposited on aluminum alloy

Studies on chrome free galvanic conversion coating on magnesium alloy AZ31B for space applications

Effect of Sn4+Additives on the Microstructure and Corrosion Resistance of Anodic Coating Formed on AZ31 Magnesium Alloy in Alkaline Solution

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Effect of Sn⁴⁺Additives on the Microstructure and Corrosion Resistance of Anodic Coating Formed on AZ31 Magnesium Alloy in Alkaline Solution