Polymer Composite Coating Performance Evaluation On Carbon Steel In Mixed Brine Solution

Nordin, Mohd Najmi Naim (2017) Polymer Composite Coating Performance Evaluation On Carbon Steel In Mixed Brine Solution. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text (24 Pages) Polymer Composite Coating Performance Evaluation On Carbon Steel In Mixed Brine Solution.pdf - Submitted Version Download (1MB)

Abstract

Pressure vessel is one of the important equipment in petrochemical industries due to its requirement to store chemical, mixing and many more.Since,most of pressure vessel is made up of carbon steel ASTM A516 Gr.70,Belzona 4341 and 4311 coating are selected as to protect the vessel from corrode and erode.The objectives of this study are to determine the effect of pH on Belzona 4341 and 4311 coating in mechanical wear,hardness and electrochemical performance and to estimate the degradation of the coating life.The coating samples are undergo immersion test under controlled temperature as per ASTM D6943 as to evaluate solution ingression and corrosion formation.The wear behavior is done on the coating according to ASTM G-99 using pin-on disk measurement before and after immersion in NaOH solution with various pH value.Last but not least,hardness and electrochemical test is done to the coating samples after 4,8,12 and 16 days of immersion.From the results,Belzona coating 4341 and 4311 have very minimal solution ingression during the immersion test.Solution that ingress inside the coating surface affect the performance by reduced the wear resistance and thus decreased the life of the coating.Longer the immersion time will increased the current density,with low resistance the samples are susceptible to corrode.Belzona 4341 shows better mechanical performance and have higher estimate life compared to Belzona 4311.

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