Author(s)

Arturo Barba-Pingarrón¹, Raúl Valdez-Navarro¹, Félix Sánchez-De Jesus², Ana María Bolarín-Miró², Rafael González-Parra¹, Alba Covelo-Villar¹, Miguel Ángel Hernández-Gallegos¹, Carlos Domínguez-Ríos³

¹Centro de Ingeniería de Superficies y Acabados (CENISA), Facultad de Ingeniería, Universidad Nacional Autónoma de México, 2 Nivel Edificio “T” (Bernardo Quintana), Circuito Exterior, Ciudad Universitaria, Ciudad de México, México.
²área Académica de Ciencias de la Tierra y Materiales, Universidad Autónoma del Estado de Hidalgo, Pachuca, México.
³Centro de Investigación en Materiales Avanzados, Chihuahua, México.

Flame Thermal Spray (FTS) coatings frequently show some porosity and reduced adherence to substrate, which affect its properties, especially its corrosion resistance. In this work, the corrosion resistance of AISI 1018 carbon steel coated by different methods is compared: electroless nickel (EN) coating, NiCrFeBSi obtained by FTS, duplex coatings of an EN deposit on a layer of NiCrFeBSi obtained by FTS and a layer of NiCrFeBSi on an EN deposit. The coatings were characterized using optical microscopy and scanning electron microscopy techniques, EDS microprobe microanalysis, roughness as well as electrochemical polarization tests to obtain the corrosion rate. The results show the enhancement in the corrosion resistance in saline medium of the duplex coatings, especially of the EN coating on FTS layer.

Flame Thermal Spray Coatings, Electroless Nickel Plating, Duplex Coatings, Corrosion Resistance

Barba-Pingarrón, A. , Valdez-Navarro, R. , Sánchez-De Jesus, F. , Bolarín-Miró, A. , González-Parra, R. , Covelo-Villar, A. , Hernández-Gallegos, M. and Domínguez-Ríos, C. (2017) Enhancement of Corrosion Resistance of NiCrFeBSi Coatings Obtained by Flame Thermal Spray Process Adding an Electroless Nickel Coating Ni-P. Journal of Surface Engineered Materials and Advanced Technology, 7, 86-97. doi: 10.4236/jsemat.2017.74008.