of the critical components of corrosion monitoring is analyzing
the samples taken from the process stream and reporting accurate
and relevant data to the system operators. Caproco’s facilities
include a full-service laboratory, staffed with trained technologists.
Samples, such as corrosion coupons, are either sent in by clients
or brought in by our field service crews.
coupon numbers, locations (including positioning in the line), installation
date and removal date are recorded; the coupons are cleaned either
mechanically or chemically and then weighed. Final coupon weight
is compared to its initial weight (stored in our database) and the
weight loss of the coupon is determined. Using the weight loss and
exposure interval, a corrosion rate can be mathematically calculated,
and is reported in metal loss in mils per year (mpy) or micrometer
per annum (uma). This data is then used to calculate information
such as radial depth of pipe wall lost per annum.
the case where pitting is identified, the deepest pit on the coupon
is measured and a mathematical formula is used to calculate the
pitting rate (in mpy).
advantage of in-house sample analysis is that lab technologists
and service technicians can share information and analyze results
together. Service crews can explain first-hand the condition of
the coupons upon removal, the local operating conditions and any
other information that often proves useful to lab analysis.
data report is generated upon completion of the coupon analysis and is
available to the client by electronic mail, diskette, mail, courier or
facsimile. Results are not limited to corrosion rates, but may also include
information specific to the corrosion mechanism encountered, such as:
pitting, scale build-up and severity of attack. All analysis is completed
in accordance to industry and/or customer standards.
When combined together with observations from field technicians
and lab technicians, the corrosion monitoring reports provide the client
with information critical to their operations and are another example
of Caproco’s integrated advantage.
To view tecnical
catalog sheets on:
Corrosion Coupons (Click
Recommended Practice and Procedure for the Use of Corrosion Coupons (Click