ASSURANCE OF STRUCTURAL STEEL SURVIVABILITY  BASED ON RESERVATION OF PRODUCTION FACILITIES  CORROSION PROOFNESS

The paper deals with the task of selecting quality and reliability indices of means and methods of corrosion protection considering structural strength requirements. Systematized description of standard (basic, characteristic) impacts and representative values of negative corrosiveness factors is provided. For corrosion protection design, classification features of steel structures and their protective coatings based on criticality rating are specified. Design indices of structural steel durability are discussed. The developed methodology involves an analytical–experimental estimate of reliability and availability factors of corrosion protection. Logistical system has been generated for reserve planning of survivability of structure on the basis of corrosion proofness signs. A method is proposed for calculating compensation for corrosion losses when comparing competitive advantages of corrosion protection systems. The index of corrosion protection level is specified for managing process safety on the basis of risk reduction.

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Assessing Soil Corrosivity for Buried Structural Steel

Volume 1: Pipeline and Facilities Integrity ◽

10.1115/ipc2020-9285 ◽

2020 ◽

Author(s):

Yannick Beauregard ◽

Andrea Mah

Keyword(s):

Literature Review ◽

Structural Steel ◽

Corrosion Protection ◽

Cost Savings ◽

Steel Structures ◽

Data Set ◽

Industry Standards ◽

Soil Corrosivity ◽

Corrosion Of Steel

Abstract Corrosion of steel structures in soils has been a topic of industrial research for many decades. The research has shown that the corrosivity of a soil is highly variable and a function of numerous interconnected parameters including soil resistivity, moisture content and pH. Despite the complexity of the soil environment, methods to evaluate soil corrosivity, guidelines for corrosion control during the design phase and lifetime of a structure have been developed. By applying this understanding, an opportunity exists to optimize the corrosion protection and capital expenses for new projects associated with corrosion protection of buried structural steel components. For instance, for new projects, e.g., identifying regions of low corrosivity where coatings are not required could lead to cost savings without compromising the integrity of the structure. However, within the industry, there is no universally accepted method to guide such decisions. This paper is intended to address this issue by presenting a literature review and a case study on the topic. The literature review identifies the factors that influence the corrosion of buried steel structures, the range of corrosion rates observed on buried steel structures and quantitative and qualitative methods for assessing soil corrosivity. In the desktop case study, industry standards identified during the literature review (AASHTO R27-01, DIN50929-3:2018, ANSI/AWWA C105/A21.5 and Eurocode 3-5) are applied to applied to evaluate the soil corrosivity at three meter station sites in Alberta. The results are compared and recommendations for implementation are discussed. DIN 50929-3 stands out among the standards as it provides conservative estimates based on the most comprehensive data set and unlike the other standards, it assesses soil corrosivity both qualitatively and quantitatively.

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Current issues of improving the pricing system in construction in the transition period

Vestnik MGSU ◽

10.22227/1997-0935.2020.4.518-532 ◽

2020 ◽

pp. 518-532

Author(s):

Vladimir P. Korolyov ◽

Galina A. German

Keyword(s):

Structural Steel ◽

Corrosion Protection ◽

Online Monitoring ◽

Load Capacity ◽

Structural Elements ◽

Regulatory Requirements ◽

Protection Measures ◽

Reliability Indices ◽

Constitutive Parameters ◽

Corrosion State

Introduction. In the world practice, promotion of structural steel for execution of new effective projects for building and installation construction is linked with innovative introduction of new materials and technologies. This process is specified by the regulatory requirements for reliability of building facilities including indices of load capacity, serviceability and durability. At the same time, the priority is to prevent corrosion damages based on the analysis of the design consideration and assurance of quality of corrosion protection measures. However, for today the possibilities of the concept of limit states as the main instrument for eliminating uncertainty of corrosion protectability parameters are not fully unveiled. The aim of the study is to justify the technical and economic parameters of corrosion protectability in the course of structural steel designing taking into account the required level of structural steel reliability. Materials and methods. The regulatory requirements for means and methods of corrosion protection of structural steel are analyzed on the basis of limit state design principles. Considered are the features of the process approach for affirming compliance of corrosion protectability indices of structural steel. Established are the conditions that allow carrying out the static check and mathematical modeling of design criteria for load capacity, serviceability and durability. Determined are the nomenclature, indices and methods of offline and online monitoring of the constitutive parameters of corrosion state of structural elements. Results. The regulations in force based on the interval estimation of indices of corrosion resistance and life of protective coatings describe conditions of protective means designing as a state or case linked with corrosion hazard. Corrosion protectability defines conditions for designing the corrosion protection measures based on the specified design criteria for serviceability and durability. At that, design decisions of primary and secondary protection are justified by means of computational or computational-measuring verification of compliance of quality and reliability indices of protection means Conclusions. Design characteristics of corrosion resistance and durability obtained by offline and online monitoring of the constitutive parameters of corrosion state of structural elements provide engineering of corrosion protection quality. Management of quality and reliability indices based on corrosion protectability signs lays the groundwork for robust designing measures for the long-term technical and economic protection of building facilities

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