Opportunities and challenges explores the latest biological approaches to microbial corrosion and its inhibition. Microbial corrosion, also called bacterial corrosion, bio corrosion, microbiologically influenced corrosion, or microbially induced corrosion mic, is corrosion caused or promoted by microorganisms, usually chemoautotrophs. Microbiologically influenced corrosion in petroleum product. Pitting corrosion of stainless steel ss is observed in many different industries including the dairy industry. Thus, the resistance of stainless steels to this corrosion type increases with increasing content of the alloying elements, which are beneficial for resistance to pitting corrosion and crevice corrosion. Various different mechanisms have been proposed since 1934. Review of microbially induced corrosion and comments on needs related to testing procedures m. Increased diversity in the corrosion layer microbial communities was detected when the corrosion rates were higher. Mar 10, 2014 microbiologically induced deterioration mid causes corrosion of concrete by producing acids including organic and inorganic acids that degrade concrete components and thus compromise the integrity of sewer pipelines and other structures, creating. Microbiologically influenced corrosion in fire sprinkler. Any replacement or repair of ss equipment is very costly and also causes delays in product manufacture. Microbiologically influenced corrosion mic can occur in a range of materials used in the petroleum industry. Understanding corrosion and microbiologically induced.
This occurs in several forms and can be managed by traditional control methods and biocides. Sulphuricacidproducing thiobacilli cause severe corrosion of concrete walls in sewage pipelines. Sulfatereducing bacteria srb induced corrosion of carbon steel in a corrosive medium such as seawater is a. Us20160069160a1 treatment of microbialinfluenced corrosion. This process of degeneration chiefly acts on metalloids, metals and rockbased matter. It is a significant cause of corrosion of manmade structures, most notably underground pipelines. Microbiologically induced corrosion mic has been reported in several papers and journals in the literature. The second best way to stop corrosion would be to eliminate the water. Weiss lyles school of civil engineering, purdue university abstract concrete is the most widely used material for the construction of the wastewater collection, storage, and. Sep 26, 2014 zuo 2007 described three possible mechanisms of the inhibition of biofilm induced metal corrosion.
Several terms are currently used as synonyms for mic. Microbiologically influenced corrosion mic mechanisms and mitigation a dissertation presented to. As part of a large corrosion institute with extensive expertise on co2, h2s and sulfur corrosion, the institutes work has benefited greatly from conventional corrosion engineers by performing corrosion tests correctly, thus avoiding costly mistakes easily found in published mic literature. As a result, it is not uncommon for wastewater system components to be refurbished or replaced every 10 years. Case histories from experience and the published literature illustrate factors which resulted in microbiologically influenced corrosion mic of stainless steel piping, storage tanks and heat exchangers by waters used for hydrotesting, cooling and other purposes. The kinetic and thermodynamic studies of microbial corrosion reaction on the surface of mild steel in 3% sodium chloride solution have demonstrated that the adsorption of nutrient molecules over. Microbial corrosion is a serious challenge for the oil and gas industry worldwide, leading to huge economic losses and production issues. View enhanced pdf access article on wiley online library html view download pdf for offline viewing. Microbiologically induced corrosion mic is the deterioration of a metal by corrosion processes that occurs directly or indirectly because of the metabolic activity. Microbiologicallyinfluenced corrosion mic, also referred to as. Microbially influenced corrosion mic or biocorrosion is recognized as an.
The rate of acceleration, however, may be from 10 to times conventional corrosion rates, requiring that mic be addressed as a distinct corrosion process from a practical standpoint. Successful mitigation of microbial corrosion requires a complete characterization of the microbial community present in the system. Nitrifying organisms have been found in high cell numbers on historical sandstone buildings as well as on concrete buildings. Simple methods for the investigation of of the role of. The enhanced corrosion rate was due to the higher sulfide uptake rates induced by wastewater inoculation, although the increasing trend of sulfide uptake rates was slower with wastewater. Some of the mostly known mechanisms are presented in this study. Microbial corrosion is one amcli lg the many forms of corrosion that contributes to substantial losses to. Microbialinduced corrosion in nuclear power plant materials.
It is estimated that in north america and the united kingdom, billions of dollars worth of damage to pipes, industrial machinery, sewer, etc. Stainless steels by water used for cooling and hydrostatic testing. Microbiologically influenced corrosion mic, microbial corrosion or biological corrosion causes and prevention. Microbiologically influenced corrosion of stainless steels. Carbon and lowalloy steels, stainless steels and copper alloys are all susceptible to mic in rawwater applications. This seawater and produced water may also contain bacteria such as. Mic is the acronym for microbally influenced corrosion. Microorganisms are microscopic or submicroscopic in size, meaning that individual organisms are too small to be viewed by the unaided human eye.
Hydrogen induced cracking or blistering edyvean et al. Microbiological corrosion an overview sciencedirect topics. Microbiologically influenced corrosion and its mitigation material. Microbiologically induced corrosion mic is an insidious condition caused by biological growth, typically bacteria, algae, or fungi, in water under low flow or stagnant conditions. Mic is not a single, easily identifiable corrosion mechanism.
Microbial corrosion of concrete in sewers is known to be caused by hydrogen sulfide, although the role of wastewater in regulating the corrosion processes is poorly understood. To investigate srb induced corrosion, understanding of its mechanism is necessary. Biocorrosion microbially induced corrosion is also observed in refineries, cooling water systems, sprinkler water systems, oilfield waterhandling systems, oil pipelines, and gas processing plants, but is not always recognized as a major issue in steam hightemperature systems. No study has systematically investigated the impacts of wastewater inoculation on the corrosion of concrete in. Microbiologically influenced corrosion in fire sprinkler systems. For instance, aerobic bacteria such as acidithiobacillus thioxidants can cause significant corrosion as it serves as a factor in biogenic sulfide corrosion.
Mic is not a new corrosion mechanism but it integrates the role of microorganisms in corrosion processes. Maluckov corrosion of steels induced by microorganisms 225 corrosion of steel caused by microorganisms the wide application of various types of steel in industries is a consequence of their ability to create passive thin films resistant to electrochemical corrosion. Zuo 2007 described three possible mechanisms of the inhibition of biofilminduced metal corrosion. The corrosion products on the coupon surface caused by the b. Jul 20, 2017 microbiologically influenced corrosion, or mic. Microbiologically induced corrosion mic technically functions as an accelerant to more conventional corrosion processes. Microbiologically induced corrosion is a type of corrosion that degrades metal by. Supplement 3 microbiologically influenced corrosion in fire sprinkler systems bruce h. Superiority of graphene over polymer coatings for prevention. Surfaces of well servicing equipment are treated with both a biofilm remover, which can be a mechanical or chemical, and a biocide composition. Microbiologically influenced corrosion of carbon steel. Sulfatereducing bacteria srbinduced corrosion of carbon steel in a corrosive medium such as seawater is a good example of the complex interactions and. The long construction times associated with nuclear plants and the large number of redundant or standby systems where water is allowed to remain stagnant for long periods of time produce conditions under which microbial induced corrosion mic can occur.
It refers to the possibility that microorganisms are involved in the deterioration of metallic as well as nonmetallic materials. Jan, 2014 the second best way to stop corrosion would be to eliminate the water. Pdf microbiologically induced corrosion researchgate. Sulfide induced stress corrosion cracking edyvean et al. Speight phd, dsc, in oil and gas corrosion prevention, 2014. Microbiologically induced deterioration mid causes corrosion of concrete by producing acids including organic and inorganic acids that degrade concrete components and thus compromise the integrity of sewer pipelines and other structures, creating. Microbiologically influenced corrosion in fire sprinkler systems bruce h. Even though we do our very best to keep dry systems dry, the fact is, that theres always going to be some water in the pipes to keep the corrosion triangle at play. Microbiologically influenced corrosion of a pipeline in a.
Microbiologically influenced corrosion mic mechanisms and. Microbiologically influenced corrosion of stainless. Environmental concerns over worsening air pollution problems caused by emissions from vehicles and depletion of fossil fuels have forced us to seek fuels such as biodiesel which can supplement petrofuels. The long construction times associated with nuclear plants and the large number of redundant or standby systems where water is allowed to remain stagnant for long periods of time produce conditions under which microbialinduced corrosion mic can occur. Increased diversity in the corrosionlayer microbial communities was detected when the. Microbial corrosion, also called bacterial corrosion, biocorrosion, microbiologically influenced corrosion, or microbially induced corrosion mic, is corrosion caused or promoted by microorganisms, usually chemoautotrophs. Corrosion promoting mechanisms sulfur, sulfate and. Microbiologically influenced corrosion wiley online library. What is microbiologically influenced corrosion mic. Microbiologically influenced corrosion mic of plain carbon steel in anaerobic soil was investigated using field survey, the electrochemical polarization technique, electrochemical impedance spectroscopy eis, scanning electron microscopy sem coupled with energydispersive spectroscopy eds, a thinfilm electrical resistance er probe, and galvanic current measurement. Mechanisms of microbiologically influenced corrosion. Under anoxic conditions or in systems with only temporary o 2 ingress, microbial corrosion tends to be even more pronounced. Pitting corrosion rate over 1 mmyear will definitely attract attentions from researchers and engineers in the oil and gas industry, serving as a warning that neglect of mic caused by nrb could cause serious pipeline integrity problems.
Wastewaterenhanced microbial corrosion of concrete sewers. The biocide composition is designed to be effective to prevent regrowth of bacteria over a period of time in which the equipment is expected to be out of service. Equipment and infrastructure degradation can cost a typical u. Combating microbial induced concrete corrosion at wastewater. Microbial corrosion plays a huge role in material degradation. Here, we report the use of an ultrathin, graphene skin gr as.
Biodiesels have the ability to retain water and provide a conducive environment for microbiologically influenced corrosion mic which may cause difficulties during transportation, storage. Here, corrosion results from microbial metabolic products such as organic acids 27, 28, hydrogen sul. Microbial induced corrosion mic is a possible accelerator of natural corrosion seen in galvanized steel. Mic is corrosion due to the presence and activities of microorganisms. Mic testing microbiologically induced corrosion normally completed on domestic supply water for new construction projects or existing fire sprinkler system to determine if bacteria known to contribute to mic microbiological induced corrosion is present. Mar 26, 2018 microbial induced concrete corrosion in sewage and water treatment systems is a natural enemy of conventional plants, frequently causing damage to concrete and metal elements that is expensive to repair. The nitric acid, which is excreted by these organisms as metabolic endproduct, also.
This type of corrosion applies to nonmetallic objects as well as metals. Microbiologically induced corrosion mic inspectioneering. A study of microbiological induced corrosion 2015 wwett conference february 23, 2015 claude goguen, pe, national precast concrete association. The bacteria excrete sulphuric acid, which degrades carbonaceous binding material.
Aug, 2019 this type of corrosion applies to nonmetallic objects as well as metals. Biological treatment of microbial corrosion 1st edition. Microbiologically influenced corrosion mic intro via dnv gl. Sulfatereducing bacteria srbinduced corrosion of carbon steel in a corrosive medium such as seawater is a.
Mar 30, 2016 equipment and infrastructure degradation can cost a typical u. Microbiologically influenced corrosion mic does not involve new corrosion mechanisms. Therefore, mic represents a serious problem in several fields. Studies related to microbially induced corrosion of. It can apply to both metals and nonmetallic materials. Flooding and splashing of wastewater in sewers periodically inoculates the concrete surface in sewer pipes. Microbiologically induced corrosion mic is the deterioration of a metal by corrosion processes that occurs directly or indirectly because of the metabolic activity of microorganisms in cold. Several alternative terms are also used to denote the phenomenon, for example, microbially induced corrosion, microbial corrosion, and biocorrosion. Review of microbially induced corrosion and comments on. Supplement 3 has been included to provide the user with background information related to microbiologically influenced corrosion or mic. Microbiologically influenced corrosion mic mechanisms. European journal of engineering and technology vol. Microbiologically influenced corrosion mic, despite its relatively short life.
Prevention of microbially induced corrosion mic is of great significance in many environmental applications. The book provides comprehensive information on the current knowledge of microbes involved in corrosion and their mechanisms of action on corrosion induction and inhibition. Corrosion of the old coupons, on the other hand, represents the corrosion processes occurring after corrosion is well established i. Microbiologically influenced corrosion is also known as biological corrosion and microbial corrosion. Microbial corrosion is the corrosion brought about by the activities and presence of microbes. Microbial induced concrete corrosion in sewage and water treatment systems is a natural enemy of conventional plants, frequently causing damage to concrete and metal elements that is expensive to repair. Microbiologically influenced corrosion little major. It is quite clear that the microorganisms affect the.
931 888 1207 98 719 930 730 756 967 414 28 1151 699 620 349 857 235 824 1032 1482 1403 326 550 1101 1273 1200 1273 111 1225 1231 1361 1490 1222 638 443