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Electrochemical Characterization of Advanced High Strength Steel DP 780 MPa

2020; Springer International Publishing; Linguagem: Inglês

10.1007/978-3-030-36296-6_53

2367-1181

A. Escalona Gómez, Marisol Delgado Espino, M. del R. Lara Banda, Facundo Almeraya-Calderón,

Non-Destructive Testing Techniques

Nowadays, with the increase of environmental problems, car safety became the major priority for the automotiveAutomotive industry. This is why advanced high strengthHigh strength steels were implemented instead of conventional steels. Dual-phase (DP) steels are part of this group due to their excellent combination of mechanical propertiesMechanical property. The objective of this work is to study the corrosionCorrosion behavior in a DP steelSteel with a tensile strength of 780 MPa, in the presence of chlorides, applying electrochemicalElectrochemical techniques obtaining parameters such as corrosionCorrosion rate, type of corrosionCorrosion, density of corrosionCorrosion current, and corrosionCorrosion potential. To know the chemical compositionChemical composition of the material, the X-ray fluorescence technique was used, at the end of the tests a stereoscope was used to see its morphologyMorphology. As electrolytes were used: water (H2O), magnesiumMagnesium chlorideChloride (MgCl2), sodium chlorideChloride (NaCl), and calcium chlorideChloride (CaCl2) at 3.5 wt% and was evaluated using electrochemicalElectrochemical techniques of potentiodynamic polarizationPotentiodynamic polarization curves (PP) and electrochemical noiseElectrochemical noise (EN), using a three-electrode cell. The results indicated activation in the anodic branch, in addition there is pitting corrosionPitting corrosion in the material under study mostly in the presence of magnesiumMagnesium chlorideChloride.