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 Fig 3: Examples of corrosion striations. This style of corrosion looks like scratch marks and requires special consideration when being inspected using ultrasonic methods, since the striated corrosion surface profile affects the reflected ultrasound signal.
|  Fig 4: General corrosion patterns range from the image on the left (with little or no good wall) to the image on the right (with only minor corrosion throughout the surface).
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Fig 5: Photomicrograph of a SCC crack in pipeline steel.
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Fig 6: Photograph of a SCC crack at the weld fusion line (toe crack). Branching nature that may occur at the crack tip can clearly be seen in this profile.
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Fig 7: Photomicrograph of a SCC in a weld. The two indications shown are located adjacent to one another and both occur within the weld material.
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