Corrosion and corrosion prevention in heat exchangers

Faes, Willem; Lecompte, Steven; Ahmed, Zaaquib Yunus; Bael, Johan Van; Salenbien, Robbe; Verbeken, Kim; Paepe, Michel De

doi:10.1515/corrrev-2018-0054

Cited by 104 publications

(48 citation statements)

References 74 publications

(91 reference statements)

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“…The most problematic for maintaining the proper microstructure and sufficient pitting resistance seems to be the single- and two-runs of the thin-walled welds. Such problems appear in the seal welds of shell-and-tube heat exchangers [ 55 ]. Delicate girth welds in-between massive perforated bottom and thin-walled pipe are often welded with an intense mixing rate of weld and parent material of the pipe, and additionally, the cooling rate is higher due to massive perforated bottom.…”

Section: Recommended Welding Technologiesmentioning

confidence: 99%

Duplex Steels Used in Building Structures and Their Resistance to Chloride Corrosion

Maślak

Stankiewicz

Ślązak³

2021

Materials

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Welded structures made of duplex steels are used in building applications due to their resistance to local corrosion attack initiated by chlorides. In this paper, the material and technological factors determining the corrosion resistance are discussed in detail. Furthermore, recommendations are formulated that allow, in the opinion of the authors, to obtain a maximum corrosion resistance for welded joints. The practical aspects of corrosion resistance testing are also discussed, based on the results of qualification tests. This work is of a review character. The conclusions and practical recommendations are intended for contractors and investors of various types of structures made of the duplex steel. The recommendations concern the selection and use of duplex steels, including the issues of metallurgy, welding techniques, and corrosion protection.

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Section: Recommended Welding Technologiesmentioning

confidence: 99%

Duplex Steels Used in Building Structures and Their Resistance to Chloride Corrosion

Maślak

Stankiewicz

Ślązak³

2021

Materials

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“…Isı eşanjörlerinde kullanılan malzemeler zamanla bulunduğu ortamla etkileşime uğrayarak malzemede korozyona neden olmaktadır. Isı eşanjörlerinin korozyon arızaları yaygındır ve genellikle yüksek bakım veya onarım maliyetleri gerektirmektedir [13]. Çoğu arıza, çukurcuk veya gerilme korozyonu gibi korozyon biçimlerinden kaynaklanmaktadır.…”

Section: şEkil 1 (A) Chiller Ve (B) Sıcaklık Kontrol Cihazlarıunclassified

Kalıp Şartlandırıcı Serpantinde Oluşan Korozyonun İnhibitör Kullanımıyla Engellenmesi

Sarioğlu

Kurtay

Yıldız

et al. 2021

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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Plastik enjeksiyon üretiminde üretilen ürünün, kalıptan soğutularak çıkarılması için su kullanılmaktadır. Zamanla kullanıma bağlı olarak ısınan suyun sıcaklığını istenilen derecede tutmak için chiller cihazları kullanılmaktadır. Enjeksiyon makinelerinde ısınan su, chiller cihazlarında bulunan bakır serpantin (eşanjör) yardımıyla soğutularak tekrar kullanıma hazır hale getirilmektedir. Bu çalışmada; bakır serpantinin korozyonu yapay soğutma suyu (SCW) ve yapay soğutma suyuna katılan 1000 ppm NaNO2 ortamlarında 21 gün süreyle sürekli su devir daimi yapılarak araştırılmıştır. Deney öncesi ve sonrası bakır serpantinin yüzeyi Taramalı Elektron Mikroskobu (SEM), Enerji Dağılımlı X-Ray Kırınımı (EDS) ve Atomik Kuvvet Mikroskobu (AFM) yöntemleri ile incelenmiştir. Korozyon inhibitörü olarak kullanılan NaNO2 bileşiğinin, bakır serpantin üzerinde bir koruyucu film oluşturarak korozyona karşı koruduğu belirlenmiştir.Anahtar Kelimeler: Bakır serpantin, Korozyon, NaNO2, Yapay soğutma suyu

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“…The cooler and the reboilers are not directly connected as per the following functional description. 6 , 7 …”

Section: Introductionmentioning

confidence: 99%

Lab Case Study of Microbiologically Influenced Corrosion and Rietveld Quantitative Phase Analysis of X-ray Powder Diffraction Data of Deposits from a Refinery

Khanfar

Sitepu

2021

ACS Omega

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This paper reports a laboratory-based case study for the characterization of deposits from a crude cooler and reboilers in a Saudi Aramco refinery by microbiologically influenced corrosion (MIC) using microbial, metallurgic, and special analyses and correlates the Rietveld quantitative phase analysis of high-resolution X-ray powder diffraction (XRD) data of scale deposits with microbe compositions. Therefore, rapid in-field microbiological assays could be carried out to assess the potential of MIC. Based on the results, it can be highlighted that the MIC investigation showed that total bacteria and sulfate-reducing bacteria (SRB) were detected in all sampling locations. Methanogens, acid-producing bacteria, and sulfate-reducing archaea were not detected in all samples. Iron-oxidizing bacteria (IOB) were detected in the solid samples from reboilers C and D. Low loads of general bacteria and low levels of microbes with MIC potential were detected in both C and D samples. The trace amount of corrosion products in one sample and the low level of MIC microbes cannot justify the contribution of MIC microbes in the formation of accumulated solids in the system. The findings recommend conducting frequent sampling and analysis including water, oil, and solid from upstream locations to have more decisive evidence of the likelihood of the scale formation and possible contribution of MIC in the formation of deposits in the plant. Subsequently, quantitative phase analysis of XRD data of scale deposits by the Rietveld method revealed that the major phase is calcium sulfate in the form of anhydrate and the minor phases are calcium carbonate in the form of calcite and aragonite, silicon oxide in the form of quartz, and iron oxide corrosion product in the form of magnetite. The results are supported by high-resolution wavelength-dispersive X-ray fluorescence (WDXRF) results. These accurate and reproducible X-ray crystallography findings obtained from Rietveld quantitative phase analysis can guide the field engineers at the refineries and gas plants to overcome the problems of the affected equipment by drawing up the right procedures and taking preventive actions to stop the generation of these particular deposits.

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Corrosion and corrosion prevention in heat exchangers

Cited by 104 publications

References 74 publications

Duplex Steels Used in Building Structures and Their Resistance to Chloride Corrosion

Duplex Steels Used in Building Structures and Their Resistance to Chloride Corrosion

Kalıp Şartlandırıcı Serpantinde Oluşan Korozyonun İnhibitör Kullanımıyla Engellenmesi

Lab Case Study of Microbiologically Influenced Corrosion and Rietveld Quantitative Phase Analysis of X-ray Powder Diffraction Data of Deposits from a Refinery

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