Residual stresses in dissimilar metal joints of copper and aluminium alloys have been measured using an X-ray diffraction technique and estimated by finite element analysis. The effects of local tensile and com pressive residual stresses in the joints on corrosion in artificial seawater have been investigated, using a potentiodynamic polarisation method. Galvanic cor rosion at the dissimilar metal weld region may be enhanced by the additional effect of differential stress induced by welding.
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