Mett-Bio Metallurgical Testing and Analysis an independent testing and analysis division with ISO 17025:2017 NABL accreditation located at Ahmedabad is involved with Corrosion Testing and Failure Analysis since 2013. We are pleased to introduce the Corrosion Test Coupons an inexpensive means of on-line monitoring that will allow you to monitor the corrosion within your systems effectively. Materials life assessment can be easily assessed based on the mile per year corrosion rate of an exposed coupon.

Mett-Bio can help you make coupon in any shape, size and material (viz. ferrous, non-ferrous and elastomeric) you need. Suitable marking can be stencilled on the coupons as-well based on the requirement. Typical Coupons shape manufactured are: Flat Strip Type, Disc Coupons and Cylindrical Coupons. Mett-Bio offers a variety of coupon holders and additionally can design and manufacture custom holders as per requirements.
Additionally, Mett-Bio offers corrosion inhibitor bags which are best suitable corrosion resistant bags for the storage of ferrous and non-ferrous coupons..

Versatile Material Selection for Accurate Corrosion Monitoring

Choose from a wide range of materials-including Mild Steel, Copper, Brass, Aluminium, Monel, SS304, SS316, or specific alloys-to closely replicate actual process conditions. This flexibility enables tailored corrosion monitoring for different industrial environments, helping operators make informed maintenance decisions.

Precision Engineering and Traceability

Each corrosion coupon features a smooth, chemical-cleaned surface and is pre-weighed, stamped, and laser-etched with a unique serial number. This combination ensures traceability throughout testing, while strict adherence to ASTM, NACE, DIN, and ISO standards guarantees accurate and reliable results, even over prolonged exposure periods.

Ready-to-Use and User-Centric Design

Coupons are delivered individually packed in moisture-proof envelopes and can be supplied pre-treated to user specifications. Installation is manual and straightforward, using a mounting holder suited to pipelines or vessels. The passive design requires no electronics, supporting hassle-free, long-term corrosion monitoring.

FAQ's of Corrosion Coupon (Strip Type):

Q: How is a corrosion coupon (strip type) used for monitoring corrosion rates?

A: Corrosion coupons are installed in pipelines, tanks, or vessels using a dedicated holder. Over a set monitoring period-typically 3, 6, or 12 months-the coupon is exposed to the actual process environment. After retrieval, it is cleaned and weighed, and the weight loss is used to calculate the corrosion rate, reported in mm/year or mils/year.

Q: What material options are available for corrosion coupons?

A: Material choices include Mild Steel, Copper, Brass, Aluminium, Monel, SS304, SS316, and custom alloys upon request. Selecting a material that matches or approximates pipe or vessel metallurgy delivers more representative corrosion data.

Q: When should corrosion coupons be replaced or inspected?

A: Coupons are typically inspected or replaced at intervals defined by the monitoring protocol, which may range from 3 to 12 months depending on system requirements and the aggressiveness of the service environment.

Q: Where are corrosion coupons commonly installed?

A: Corrosion coupons are used in a variety of settings, including inside pipelines, tanks, process vessels, or any environment requiring corrosion monitoring. Installation is performed at accessible sections to allow sampling and retrieval after exposure.

Q: What surface finish and dimensions can be supplied?

A: Corrosion coupons are provided with a smooth, chemical-cleaned surface, ready for use. Standard size is 75 mm x 12.5 mm x 1.5 mm, but custom sizes and surface preparations are available according to user needs and specifications.

Q: How does traceability and identification work with these coupons?

A: Each coupon is laser-etched or stamped with a unique serial number, ensuring full traceability throughout its use. This allows for reliable identification during analysis and record-keeping.

Q: What are the main benefits of using strip-type corrosion coupons?

A: Key benefits include accurate monitoring of corrosion rates, adaptability to various alloys and environments, compliance with international standards, easy traceability, and readiness for immediate installation. This makes them a preferred tool for preventive maintenance in critical infrastructure.