Search

• Scanning Kelvin Probe (SKP) measurements were performed through a borosilicate glass. • The potential distribution at the polymer/metal interface was measured in a real adhesive joint. • The delamination rate in the closed joint geometry was hundred times slower than in the open joint. • The delamination is limited by the ingress and availability of oxygen at the delamination front for the adhesive joint. In this paper we report on the delamination of a real closed adhesive joint geometry investigated by means of Scanning Kelvin Probe (SKP). The potential distribution at the metal/polymer interface was measured through a thin layer of glass. Quantitative measurements of the delamination kinetics were performed, accompanied by XPS inspection of the fracture surfaces. The delamination rate was found to be hundred times slower than in an open joint geometry. Furthermore, the delamination-limiting step for the open joint is the transport of cations, whereas for the closed joint is limited by the ingress of oxygen along the interphase. [ABSTRACT FROM AUTHOR]

Highlights: [•] Effect of cold rolling on pitting of 17-4 PH stainless steel is investigated. [•] Cold rolling facilitates the transition from metastable to stale pitting. [•] The frequency of metastable pitting decreases with increasing cold working. [•] Cold working does not change pitting potential distribution significantly. [ABSTRACT FROM AUTHOR]

Highlights: [•] Interfaces of FS welded Al/Cu joint was characterized by OM, SEM, AFM and SKPFM. [•] A eutectic phase mainly consisting of CuAl2 IMC and an Al-rich phase was detected. [•] Severe mechanical deformation caused a concurrent depletion/enrichment mechanism. [•] A correlation between phases and their Volta potential distribution is found. [•] Corrosion initiated from sites with relatively higher absolute Volta potentials. [Copyright &y& Elsevier]

Highlights: [•] Develop a numerical model to simulate potential and current density at defects. [•] Determine the potential distribution inside the defect under cathodic protection. [•] Evaluate effectiveness of cathodic protection at defects on pipelines. [•] Derive empirical equations for corrosion defect assessment. [Copyright &y& Elsevier]