Dr. Trevor G. Niblock Profile

Dr. Trevor G. Niblock

CTO at Analatom Inc

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Proceedings Article | 13 November 2002 Paper

Development of a commercial microcorrosion monitoring system

Trevor Niblock, Harshal Surangalikar, Jeffrey Morse, Bernard Laskowski, Mario Castro-Cedeno, Alan Wilson

Proceedings Volume 4934, (2002) https://doi.org/10.1117/12.469168

KEYWORDS: Sensors, Corrosion, Resistance, Metals, Humidity, Polarization, Etching, Electronics, Fabrication, Interfaces

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Analatom Inc. in conjunction with the DSTO (Defence Science & Technology Organisation) has been developing a micro Linear Polarization Resistance (LPR) system for assessing the integrity of high value structures. The device operates on the principle that as a metal corrodes, the oxide formed effectively creates an anodic cell. Hence, if the metal can be separated into two sections, a potential and resistance can be measured between each section. These values can be used to compute the effective mass loss of the device. By matching the material properties of the device with that of the structure whose "health" is being monitored, it is possible to establish a corrosion rate of the structure. Previous research at DSTO has shown that such a system can be fabricated and operated on the micro scale. The task has now been to develop the device into a commercially viable system; it is this development that is examined in this paper. In the original system, a potentiostat is used to evaluate the device for data relating the mass loss during corrosion. This system is now replaced with simplified electronics to reduce both the cost and size of the device. Signal conditioning into the LPR is critical as potentials over 20mV across the terminals can be a source of corrosion of the device. Micro controllers and small board computers are used to run this signal conditioning process and the LPR interface circuit.

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