A universal alternating immersion simulator for accelerated cyclic corrosion tests

Abstract

A new device for performing accelerated cyclic immersion tests is described. The main achievement is to realise a high cycling rate without a proportional increase in the test duration. The device is also capable of performing tests according to EU ISO 11130 specification. A minimal invasive drying system is used that neither heats air nor sample and the flow rate is still low as to prevent a mechanical delamination of paints or loose corrosion products. A multiple sample set-up is realised that provides individual reference electrodes. The random access through a multiplexer allows individual investigation of the samples even by electrochemical impedance spectroscopy under immersion conditions.The device and its test principle are applicable in both industrial and laboratorial scale applications. Two application examples are given to demonstrate the versatility of the alternating immersion tester. One addresses the corrosion protection performance of different zinc-coated steel sheets; the other quantifies the patina formation kinetics of low-alloyed steels with weathering properties.

Effect of Cr on the corrosion behavior of low carbon vanadium micro alloyed weathering steel in a simulated industrial atmosphere

“…[1][2][3][4] The initial advancements in weathering steel development were achieved through comprehensive outdoor exposure tests conducted across diverse atmospheric conditions including urban, industrial, and marine settings. Subsequently, various accelerated corrosion tests, such as cyclic wet/dry corrosion tests simulating industrial environments, [5][6][7][8][9][10] have been devised to expedite research. These tests offer time-saving benefits, with the corroded layer's oxyhydroxides yielding rapid insights.…”

A novel method to determine flow‐accelerated corrosion rate based on fluid structure interaction

“…The FAC of various materials has been investigated in previous works . With the development of modern computing science, scholars have focused on simulations of the FAC process and FAC rate prediction.…”

Use of Electrochemical Impedance Spectroscopy (EIS) for the Evaluation of Electrocoatings Performances

“…The degradation of the coating can be obtained using different ageing tests such as immersion in electrolyte, continuous salt fog or SO 2 exposure. Cyclic corrosion tests combining different kinds of exposures (humidity, salt fog, drying steps) are also increasingly used [10][11][12][13][14]. These methods are based on the principle that corrosion can only occur if electrolyte and oxidant species are present at the metal surface.…”