Corrosion tests applied to metals

Question 1

this is used to measure the permeation rate of atomic hydrogen associated with hydrogen induces cracking (HIC)

Answer 1

Hydrogen probe

Question 2

Internal cracks that connect adjacent hydrogen blisters on different planes in the metal, or to the metal surface.

Answer 2

HIC

Question 3

This is placed either in or on the outside walls of a vessel or piping. It works by measuring the amount of hydrogen that has been diffused into the metal surface. Either intrusive or non intrusive.

Answer 3

Hydrogen Probe

Question 4

Finds out if the inhibitor is dividing inside the system into the different phases.

Answer 4

Partition testing

Question 5

uses high frequency sound energy to conduct examinations and make measurements. sound energy is introduced and propagates through the materials in the form of waves.

Answer 5

Ultrasonic testing

Question 6

uses magnetic field to determine if equipment has cracking from stress or corrodents. Microscopic particles sprayed, magnetic force applied, particles flow and settle into any imperfection.

Answer 6

magnetic particle testing

Question 7

sample is drawn and injected into test vials. color change indicates presence, positive test does not indicate act MIC only more testing needed.

Answer 7

Bacteria Test

Question 8

autonomous devices sent and retrieved fro a pipe, propelled by product. an ILI (inline inspection) has odometer, calipers for roundness, tilt sensors, capacitive sensors, ultrasonics

Answer 8

Smart Pigging

Question 9

detects surface and near surface irregularities. don’t need to remove any surface paint. uses and electric field.

Answer 9

Eddy Current Testing

Question 10

analyze emitted sound waves caused by defects or discontinuities. between 100 kHz and 1 MHz. only gives estimate of damage.

Answer 10

Acoustic emission testing

Question 11

It is a Nondestructive Test method (NDT) that is based on the high frequency sound generated by cracks and similar flaws in materials when stressed. uses a low-noise amplifier

Answer 11

Acoustic Emission Test

Question 12

measures a change in polarization as light reflects or transmits from a material structure. used to determine film thickness.

Answer 12

Ellipsometry

Question 13

“on-line” method of monitoring corrosion rates of a metal using two metals. the probes measure electrical resistance of the exposed metal in reference to the encased metal.

Answer 13

electrical resistance probes

Question 14

gas is dissolved in the oil. use gas sparging test, take sample add filler induce foaming , time with stopwatch.

extract sample, machine uses centrifugal force to separate all constituents. tests just after separators or at where product exits.

Answer 14

Foaming and Emulsions testing

Question 15

x-ray

Answer 15

radiographic test

Question 16

optical instrument for inspection of inaccessible places

Answer 16

borescope

Question 17

used to determine the effectiveness of a protective film created by corrosion inhibitor. the minimum concentration of inhibitor needed to form a protective film is determined. dip coupon in NaCl for five min, than dip into inhibitor, than dip into CuSO4

Answer 17

copper ion displacement test

Question 18

used to measure how resilent an internal protective film is under certain corrosive environments. uses a wheel test

Answer 18

film persistency testing

Question 19

separate organic and inorganic compounds. sample injected into machine travels down hollow tube via nitrogen or helium. detector measures light.

Answer 19

chromatographic analysis

Question 20

thin membrane of cellulose fibers, filters different types of material. used mainly for water and oil

Answer 20

milipore filter analysis

Question 21

molecule containing radioactive atom put in system and followed, as it corrodes radioactive atoms transported to surface.

Answer 21

tagged radioactive molecules

Question 22

used in water injection systems to determine corrosion rates due to dissolved oxygen
probes determining the corrosivity of a fluid two dissimilar metals that exist in the pipeline are on the probe and placed in the stream like you would for one determining oxygen levels

Answer 22

galvanic probe

Question 23

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Answer 23

water and gas analysis