Corrosion Resistance of Electroless Ni-P-W/ZrO₂ Nanocomposite Coatings in Peracid Solutions

Abstract:

In current investigation, the Ni-P-W/ZrO₂ electroless nanocomposite coatings are deposited upon mild steel substrate (AISI 1040 grade). The W/ZrO₂ nanoparticles (50 to 130 nm range) were incorporated separately into acidic electroless Ni-P matrix as a second phase materials. The as-plated EL Ni-P-W/ZrO₂ depositions were also heated at 400 ^οC in Argon atmosphere for one hour duration and analyzed by SEM/EDAX and XRD physical methods. The Ni-P-W/ZrO₂ as-plated coupons revealed nebulous type structures while heated coupons showed crystalline structures in both cases. Furthermore Ni-P-ZrO₂ coatings have very less cracks and gaps as compared to Ni-P-W coatings. The corrosion tests result in peracid (0.30 ± 0.02 % active oxygen) solutions point up that corrosivity of peracid ( 500 ppm Cl) is more than peracid (0 ppm Cl) and corrosion resistance of tested coupons varies as Ni-P-ZrO₂ (as-plated) > Ni-P-ZrO₂ (heated) > Ni-P-W (as-plated) > Ni-P-W (heated) > MS. The utilization of Ni-P-ZrO₂ nanocomposite coatings in peracid solutions can be considered a cost effective option on the basis of its better cost/strength ratio in addition to its fair corrosion resistance.

• Periodical: Materials Science Forum (Volume 1048)
• Pages: 72-79
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1048.72
• Online since: January 2022
• Authors: Suriaya Hassan, Abdul Ansari, Arvind Kumar, Munna Ram, Sulaxna Sharma, Awanish Sharma*
• Keywords: Corrosion, Electroless Coating, Ni-P-W, Ni-P-ZrO₂, Peracid

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