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Accurate monitoring of corrosion rates in any
environment is critical when viewed in terms of the maintenance and repair costs
associated with corrosion and material failure. Test coupons provide an inexpensive means
of on-line monitoring that will allow you to effectively measure the corrosivity within
your system. By observing the mils-per-year corrosion rate of an exposed coupon, valuable
information can be provided regarding the material's life expectancy.
Metal Samples can make coupons in any size, shape, or material you
need. Coupons can be stenciled with alloy and sequence numbers for proper identification.
Mill test reports, identifying element compositions of materials used, are provided on all
orders.
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| Coupon after being exposed to corrosive environment. |
The following coupons are four of the most commonly used in corrosion testing.
Custom coupon sizes available.
P/N CO100 |
P/N CO131 |
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P/N CO146 |
P/N CO220 |
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| P/N | Size | Hole | Hole Location | Area Sq. In. |
| CO100 | 1/2" X 3" X 1/16" | 3/16" | 1/4" fr. end | 3.38 |
| CO101 | 1" X 2" X 1/16" | 3/16" | 1/4" fr. end | 4.32 |
| CO102 | 1/2" X 3" X 1/16" | 9/64" | 1/8" fr. end | 3.41 |
| CO103 | 1/2" X 3" X 1/16" | 1/4" | 1/4" fr. end | 3.34 |
| CO104 | 1/2" X 3" X 1/16" | (2) 1/4" | 1/2" fr. ea. end | 3.24 |
| CO105 | 1/2" X 3" X 1/16" | 3/16" | 1/2" fr. end | 3.38 |
| CO106 | 1/2" X 3" X 1/16" | 1/4" | 1/2" fr. end | 3.34 |
| CO115 | 1/2" X 3" X 1/16" | 1/4" | 1/4" fr. end | 7777 |
| CO117 | 3/8" X 3" X 1/16" | 9/64" | 1/8" fr. end | 2.64 |
| CO118 | 1/2" X 3" X 1/16" | (2) 1/4" | 1/4" & 3/4" end | 3.24 |
| CO120 | 3/8" X 3" X 1/16" | (2) 1/4" | 1/4" & 3/4" end | 2.48 |
The coupons listed above can be made from a variety of materials (see Alloys list).
| P/N | Size | Thread | Slot |
| ES200 | 1/4" X 2 1/2" | 1/4"-20 X 3/8" | 1/16" |
| ES201 | 1/4" X 2" | 1/4"-20 X 3/8" | 1/16" |
| ES202 | 1/4" X 3" | 1/4"-20 X 3/8" | 1/16" |
| ES204 | 1/4" X 1 1/2" | 1/4"-20 X 3/8" | 1/16" |
| ES209* | 1/4" x 3" | 1/4"-20 X 3/8" |
* ES209 has five 1/8" diameter scale holes.
Scale coupons (or deposition coupons) provide a qualitative measure of relative deposition rates in industrial water and manufacturing process systems.
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P/N CO115 - flat coupon |
| P/N ES209 - cylindrical coupon |
Coupons can be furnished with a variety of finishes depending on your particular application. Some of the typical finishes available are defined below.
When placing your order for test coupons, please be ready to provide the sales person with information regarding the type of material you are testing, the size of the coupons you require, surface finish desired, and if applicable, mounting hole size and location.
| Post-Exposure Coupon Analysis Once coupons have been exposed in your system for the determined period of time, send them back to Metal Samples and let our technicians perform weight loss analysis to determine mils per year (MPY) corrosion rates. We are in strict adherence to ASTM-G1 specifications for cleaning and analyzing the coupons. When using this service, ensure that initial coupon weights, exposure dates, and locations are recorded for each sample. This information can be recorded on the front of our VCI coupon storage bags. Optional services include pit depth measurement and photos of the coupons before and after analysis. Analysis pricing. |
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| Coupon Storage Bags Vapor corrosion inhibitor (VCI) bags are excellent for storage of ferrous and non-ferrous coupons. With VCI bags, coupons can be protected from corrosion for up to one year when stored under the proper environmental conditions. Pertinent test data, regarding pre- and post-coupon exposure, can be recorded in the appropriate spaces on the front of the bag. Ask for P/N BG5001 when ordering these bags. |
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| Welded Coupons Welded coupons are used to study the variance in corrosion rates between welded and non-welded metals. More. |
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Stressed Coupons These coupons are used to monitor stress corrosion cracking which occurs when stress combines with a corrosive environment to attack a material. More. |
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| Test Racks We offer test racks for the mounting of coupons of various alloys to evaluate how corrosion would effect differing materials in your system. More. |
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Coupon Holders We carry a variety of pipe plug coupon holders (for flat and round specimens), retractable coupon holders (hand insertable types for low pressure rating systems and packing gland types for ratings up to 1,500 psi.), and retrievable coupon holders (for up to 3,600 psi.). More. |
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| Technical Information on Coupon
Testing This article provides general requirements for coupon tests, types of coupon tests, advantages of coupon testing, and other helpful information. Read Article. |
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Bypass Piping Systems Metal Samples provides bypass piping systems for on-line corrosion monitoring. More. |
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| Alloys Available for Coupons |
Alloys Listed by Trademark | |||
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