Coupon Housing with ER Probe (TCHP-CUST)

CerAnode’s TCHPCUST Coupon Housing with ER Probe is a customizable coupon housing combined with an electrical-resistance (ER) probe for real-time corrosion monitoring. The housing protects the coupon and ER sensing element in a stable, controlled environment, making it ideal for long-term cathodic protection evaluation.

This assembly lets you measure both polarization behavior and corrosion rate by combining a conventional coupon with an embedded ER probe. Designed for flexibility, the TCHPCUST can be engineered to match your site’s backfill, soil conditions, and monitoring requirements.

Key Features & Benefits

Materials & Design

Integrated ER Probe: Monitors changes in electrical resistance, translating metal loss into real-time corrosion rate measurements.
Durable Coupon Material: Coupon can be manufactured from the same alloy as the protected structure for representative polarization behavior.
Conductive Backfill Optional: Housing can be filled with Loresco® Coke to improve electrical contact and reduce spread resistance, enhancing measurement stability.

Performance & Monitoring

Continuous ER Measurement: Tracks resistance increases as the sensing element loses cross-sectional area due to corrosion.
High Sensitivity: Detects small changes in probe elements, ideal for low-level or gradual corrosion.
Long-Term Stability: Housing protects the coupon and probe while maintaining consistent soil electrical contact.

Durability & Environment

Long Service Life: Coupon and probe materials can be selected for extended deployment with minimal maintenance.
Corrosion-Resistant Construction: Materials chosen to resist long-term degradation in soil or backfill.
Flexible Use Environments: Suitable for high-resistivity soils, wet backfill, or compacted systems due to adaptable backfill and sensor integration.

Customization & Installation

Modular Design: Housing geometry, ER probe type, and lead-wire configuration can be customized to site-specific requirements.
Test Station Compatibility: Integrates easily with CP test stations or junction boxes with dedicated terminals.
Simplified Maintenance: Allows inspection, replacement, or recalibration without significant disturbance.

Applications

Corrosion rate monitoring for buried pipelines, especially under coatings or wrap systems
CP system validation and performance verification on storage tanks
Areas exposed to AC interference requiring closed-loop corrosion rate feedback
Pipelines or marine structures in low-conductivity soils where potential measurements are uncertain
Remote or critical infrastructure where continuous, in-situ corrosion data helps prevent downtime and protect asset integrity

Installation & Accessories

Site Preparation: Excavate or bore per design, positioning the coupon housing so the exposure environment replicates the structure’s backfill or coating conditions.
Mount Housing: Secure the housing firmly, ensuring the coupon and ER probe remain stable and electrically isolated where required.
Connect Probe: Wire the ER probe to a data logger or test station capable of accurate resistance measurement with temperature compensation.
Add Reference / Test Leads: Install reference electrodes and test leads to support potential monitoring, IR-free measurements, and snapshot corrosion data.
Commission: Energize the CP system and take baseline readings. Log initial resistance and coupon response to establish starting corrosion behavior.
Routine Monitoring: Collect ER data at regular intervals (daily or weekly) and compare against baseline values to track corrosion trends.
Inspect & Service: Periodically verify cable integrity, inspect housing seals, and replace the coupon or probe element as required.

Documentation & Resources

Technical Data Sheet

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