High resolution corrosion monitoring system

Citation

(2001), "High resolution corrosion monitoring system", Anti-Corrosion Methods and Materials, Vol. 48 No. 6. https://doi.org/10.1108/acmm.2001.12848fad.015

High resolution corrosion monitoring system

High resolution corrosion monitoring system

Keywords: Corrpro Companies, Corrosion monitoring

Corrpro Companies Inc., a provider of corrosion protection engineering services, systems and equipment, recently announced the development of the MICROCOR high-resolution corrosion monitoring system by Rohrback Cosasco Systems (RCS), a Corrpro Company.

MICROCOR is described as offering a resolution 256 times that of traditional electrical resistance (ER) probe instruments, and response times to corrosion upsets that are reduced from days or hours to just minutes. This patented technology combines the rapid response of linear polarization resistance (LPR) technology with the universal applicability of ER. In addition, MICROCOR measurements are said to be much less sensitive to process temperature fluctuations as the electronics compensate for temperature changes.

The MICROCOR transmitter can be combined with a battery powered data logger for a stand-alone field mounted system. The transmitters and data loggers are housed in explosion proof enclosures for hazardous environments. For on-line applications, one or more MICROCOR transmitters can send corrosion data directly to the control room using RS-485.

MICROCOR probes with either cylindrical or flush elements are available in fixed, retractable and retrievable mounting styles. PC software is available which will permit the plotting of corrosion rate data in real time so that it can be correlated with other process variables such as temperature, pressure, pH, dissolved oxygen and inhibitor concentration to name a few.

Corrpro Companies, Inc., have also developed a new galvanic anode for cathodic protection of reinforced and pre-stressed concrete bridge substructures. The development of the anode resulted from a research and development program funded by the USA's Federal Highway Administration.

CORRSPRAY, an Aluminum-Zinc-Indium anode, is said to be capable of providing improved cathodic protection to steel embedded in chloride contaminated concrete structures.

The CORRSPRAY is applied to the concrete structures using electric arc spray equipment to form a protective galvanic coating. This system has reportedly outperformed thermally sprayed zinc in both field and laboratory testing. It exhibits high bond strength and the level of protection on the reinforcing steel exceeded the 100-mV polarization decay criterion for cathodic protection of steel-in-concrete. Several installations have recently been completed in both marine and northern deicing salt environments. Since the anode is a galvanic system, no rectifier monitoring is required, and maintenance is minimized.

Visually the anode coating has a gray-silver color similar to concrete. According to Corrpro, based on predicted consumption rates, the aluminum alloy can be expected to provide a reasonable life expectancy of 10-15 years.

Details available from: Corrpro Companies, Inc. Tel: +1 330 723 5082; Fax: +1 330 723 0694.