Session: RIP: Advanced Coatings and Inhibitors (Part II of III)
Corrosion Properties of Pulse electrodeposited Nickel-Chromium-Phosphorous-Tungsten alloy coatings on steel substrate (RIP2026-00069)
Wednesday, March 18, 2026
3:20 PM - 3:45 PM Central
Location: 361 DE
Earn .5 PDH
Shaik Hakim Marjuban, Dongin Lim, Ulises Martin Diaz, Md Humaun Kabir, Andy Nowasielski, Rishi Gupta, H Liang, Homero Castaneda
Texas A&M University System, Texas A&M University System, Texas A&M University - College Station, Toyota Motor North America, Toyota Jidosha Kabushiki Kaisha, Texas A&M University System, Texas A&M University System
Nickel–chromium–phosphorous–tungsten (Ni–Cr–P–W) alloy coatings were pulse-electrodeposited onto cold-rolled steel (CRS) substrates using a chloride-based electrolyte. The study evaluates how pulse current parameters (current density, frequency, duty cycle, and bath pH) influence the alloy composition, crystallite size, microhardness, surface morphology, and corrosion behavior. Electrochemical impedance spectroscopy (EIS) and cyclic polarization measurements revealed that the corrosion resistance of the Ni–Cr–P–W coatings strongly depend on Cr/W content when exposed to a 3.5 wt% NaCl environment. Enhanced corrosion performance was primarily attributed to the formation of a stable passive film, promoted by increased chromium incorporation. The presence of chromium also appeared to facilitate the development of oxide passive film, capacitive-like corrosion products, contributing to improved barrier characteristics. Additionally, the pulse-electrodeposited Ni–Cr–P–W coatings showed pulse-parameter-dependent variations in their coefficients of friction, indicating enhanced and tunable tribological performance.
