Predicting corrosion under insulation (CUI) by characterized of corrosion product

Corrosion can corrode and pollute metals and alloys in the environment. Corrosion causes the most plant and equipment failures, say experts. CUI, or corrosion under insulation, is famously difficult to identify because it occurs disguised beneath insulation materials until it becomes a substantial concern, which is frequent in petrochemical plants that have been in operation for a long period. Catastrophic failures can have a detrimental impact on the economy due to downtime and repair costs. This experiment uses X-Ray Diffraction (XRD) Analysis to identify corrosion products on coupons and SEM to examine attack corrosion surface morphology (SEM). Fabricated low-carbon steel pipe. Coupons are experiment-based. Low carbon steel 0.24mm x 0.24mm x 0.05mm (height). Installation of CUI coupons. Using a ruler, the coupon metal is 2.5 cm long. Both SEM and XRD use coupon metal size to determine corrosion rate and characteristics. Figure 1 depicts the deterioration under insulation specimen. SEM and XRD were used to test the sample. The lab did all testing. Experiment to identify Corrosion Under Insulation (CUI) by its corrosion product and surface morphology using Scanning Electron Microscope (SEM) Analysis Method and identify the corrosion coupon using X-Ray Diffraction (XRD) Analysis Method. SEM was performed on both sides of coupon metal. Front and back of the coupon. The SEM scanned all metal sides. Coupon metal was recorded 5 times per side. Graph shows image at position X. In this chart, the difference between weight and atomic number stands apparent. At point X are Oxygen, Iron, Carbon, Aluminium, and Silicon (Si). The front area’s iron content reaches 70.64 percent. The rate declined to a low point at 29.36% oxygen weight. For excellent coating adherence to metal, surface preparation and profile criteria were stressed [1]. Interactions and compatibility of polyurethane foams with anticorrosive coatings were discussed. After SEM testing, this part’s rate may approach elemental level. Back region point X only recorded Carbon (C). 100% of carbon’s mass is atomic. If there’s too much carbon, the metal may break and can’t be shaped. Not breaking doesn’t guarantee a product is good. In extreme simulated CUI settings, 2. tested three coatings (heat-resistant epoxy, new technology liquid, and thermal sprayed aluminium) for CUI protection. Higher carbon diminishes air corrosion resistance and induces rusting. Steel corrosion increases as carbon content rises. Comp