Corrosion Properties for Roll-Bonded Two-Layer AA4045/AA3003 for Heat Exchanger Application

During their service life, heat-exchangers are subjected to a variety of environments, including heating and cooling cycles, salt water environment on the surface, mechanical loading. As result, corrosion performance is critical, as perforation material could result in system failure. Corrosion behaviour brazed roll-bonded aluminium sheet significant since this most common mode failure for automotive heat exchangers, especially with trend toward lighter parts. Furthermore, thermal treatments such solution treatment, homogenization, brazing alter microstructure and, vary behaviour. The effect homogenization temperature duration AA-3xxx alloys has been studied, but more research needed. goal investigation was see how different holding times during affect Accelerated laboratory tests essential ranking trial materials ultimately qualifying an alloy production. two-layer modified sheets (AA4045/3003 Modified) examined before after brazing. propagation attributed potential differences between sheet, creating galvanically driven core by diffusion zone sea acid accelerated testing (SWAAT) electrochemical AA4045/3003 sheet. link SWAAT potentiodynamic polarization measurements established, suggesting that these approaches be used replace or reinforce so reduce cost.