Recommended Practice and Procedure for the Use of …
The corrosion rate calculated using corrosion coupons assumes uniform corrosion across the coupon (e.g. uniform corrosion of the pipe wall at the monitoring point). This approximation is acceptable for most circumstances to determine the average rate of corrosion. Of course, …
FAQs about Recommended Practice and Procedure for the Use of … Coupon?
What is corrosion coupon testing?
Corrosion coupon testing is an in-line monitoring technique; coupons are placed directly in the process stream and extracted for measurement. This monitoring technique provides a direct measurement of metal loss that allows you to calculate~the general corrosion rate. ...
How much does corrosion testing cost?
Corrosion testing is not cheap. More specifically, materials for a field rack with ten coupons will cost about $150 with 316 hardware or $250 with Hastelloy C-276 hardware. ...
How is corrosion rate calculated using corrosion coupons?
The corrosion rate calculated using corrosion coupons assumes uniform corrosion across the coupon (e.g. uniform corrosion of the pipe wall at the monitoring point). This approximation is acceptable for most circumstances to determine the average rate of corrosion. ...
How to prepare a corrosion coupon?
For details concerning the preparation of corrosion coupons, one should consult ASTM Method G1-72 (ASTM, 1982a) and NACE Recommended Practice 07-75 (NACE, 1975). Inasmuch as the insulated coupon is electrically insulated from the system, theoretically its corrosion rate is related only to the corrosivity of the water. ...
Can a corrosion coupon be used to test a cooling system?
The Cooling Technology Institute in their standard Corrosion Testing Procedures published in 2000 states “Corrosion coupons, when prepared similarly, can provide a near standardized method to compare relative performance of various water treatment conditions within a cooling water system. ...
How does corrosion coupon analysis work?
Corrosion coupon analysis involves a number of variables which may significantly affect the results of the analysis. Make sure the design of the system and the installation of the coupon rack will produce accurate test results. Be careful not to touch the coupons. Oil from your hands will promote corrosion and bias the test results. ...
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