Effect of normalization on ductility and corrosion resistance of API 5L-X65 PIPE

IF 0.7 Q3 ENGINEERING, MULTIDISCIPLINARY Engineering Review Pub Date : 2022-01-01 DOI:10.30765/er.1652

Yurianto Yurianto, A. E. Purkuncoro, Padang Yanuar, Taufiqur Rokhman

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Abstract

This research studies the effect of normalization on ductility and corrosion resistance of API 5L X65 pipe. Normalization conducted at a temperature of 900 °C with a holding time of 30, 60, 90, 120, and 150 minutes, followed by cooling down to a room temperature by using an external air. Corrosion testing of normalized specimens was performed using seawater as a corrosive environment, -and specimens were also tested for microhardness to determine their mechanical properties. Then, these test specimens were compared with specimens that did not undergo normalization in terms of their microstructure, hardness, and other mechanical properties. The specimens were analyzed by using an Energy Dispersive X-ray (EDX) Spectroscopy to determine the microstructure grain boundary, chemical composition and microcracking of the metal specimens. The results showed that the base metal hardness of API 5L X65 steel pipe fluctuated and tended to decrease. The highest hardness was obtained in specimens without normalizing, and the lowest in normalizing specimens. The highest corrosion rate occurred in specimens without normalizing, and the lowest in specimens with normalizing. Typical corrosion results of seawater on APL 5L-65 pipe are cracking and pitting.

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正火处理对API 5L-X65钢管延展性和耐腐蚀性的影响

研究了正火处理对API 5L X65钢管延展性和耐腐蚀性的影响。在900°C的温度下进行规范化，保温时间为30,60,90,120和150分钟，然后使用外部空气冷却到室温。将归一化后的试样在海水中进行腐蚀测试，并对试样进行显微硬度测试，以确定其力学性能。然后，将这些试样与未经过正态化处理的试样在显微组织、硬度和其他力学性能方面进行比较。利用能量色散x射线(EDX)光谱分析了金属试样的微观组织、晶界、化学成分和微裂纹。结果表明:API 5L X65钢管的母材硬度呈波动趋势，并有降低的趋势;未正火处理的硬度最高，正火处理的硬度最低。未进行正火处理的腐蚀速率最高，进行正火处理的腐蚀速率最低。海水对APL 5L-65管道的典型腐蚀表现为开裂和点蚀。

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Engineering Review ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.00

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0.00%

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期刊介绍： Engineering Review is an international journal designed to foster the exchange of ideas and transfer of knowledge between scientists and engineers involved in various engineering sciences that deal with investigations related to design, materials, technology, maintenance and manufacturing processes. It is not limited to the specific details of science and engineering but is instead devoted to a very wide range of subfields in the engineering sciences. It provides an appropriate resort for publishing the papers covering prior applications – based on the research topics comprising the entire engineering spectrum. Topics of particular interest thus include: mechanical engineering, naval architecture and marine engineering, fundamental engineering sciences, electrical engineering, computer sciences and civil engineering. Manuscripts addressing other issues may also be considered if they relate to engineering oriented subjects. The contributions, which may be analytical, numerical or experimental, should be of significance to the progress of mentioned topics. Papers that are merely illustrations of established principles or procedures generally will not be accepted. Occasionally, the magazine is ready to publish high-quality-selected papers from the conference after being renovated, expanded and written in accordance with the rules of the magazine. The high standard of excellence for any of published papers will be ensured by peer-review procedure. The journal takes into consideration only original scientific papers.