Abstract
An analysis architecture is built to make full use of natural environment corrosion of materials data. All environmental factors, such as average temperature, average relative humidity, rainfall hours, sunshine duration, chloride ion settlement, etc., in nine atmospheric test stations, including Beijing, Wuhan, Jiangjin, and Wanning, and seawater temperature, salinity, dissolved oxygen, pH values, etc. in four marine test stations, including Qingdao, Zhoushan, Xiamen, and Yulin, are modelled monthly using a statistical analysis technique. Normal distribution, logarithmic normal distribution, Weibull distribution, and uniform distribution of the samples are checked by the Shapiro-Wilk and Kolmogorov-Smirnov methods. Subsequently, the probability distribution function, the expected population value and variance, and the confidence interval are estimated. Corrosion data for twenty-two kinds of carbon steels, low alloy steels, and stainless steels, including A3, 3C, 16Mn, 10CrMoAl, 1Cr18Ni9Ti, in atmospheric and marine test stations are analyzed. The main environmental factors for atmospheric and marine corrosion of each type of steel are determined by grey relational analysis. Subsequently, a predictive model incorporating the main corrosion environmental factors, exposure time, and corrosion rate is built by the BP artificial neural network. After the evolution of corrosion pit depth is predicted by the artificial neural network, a fracture mechanics calculation is used to evaluate the residual life of a structure with corrosion pit defects.
Highlights
Corrosion is very harmful to the useful lifetime of materials
Electrochemical corrosion is more important than chemical corrosion in atmospheric corrosion (Morcillo et al, 2013)
This paper introduces the overall architecture for the analysis of natural environment corrosion
Summary
Corrosion is very harmful to the useful lifetime of materials. It can bring enormous economic losses and severe dangers to society. Electrochemical corrosion and chemical corrosion can occur in the atmospheric environment. In the presence of this thin-film electrolyte, atmospheric corrosion proceeds by balancing anodic and cathodic reactions. Seawater is the electrolyte solution with very high salinity It is one of the most corrosive of all the natural corrosion agents. Analysis architecture is built to make full use of these data This architecture analyzes the inherent laws of data and obtains information on the influences of natural environment factors and the evolutionary rule of corrosion damage. This provides corresponding support and help for research on natural environment corrosion
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call