炭素綱配管内に生じた孔食深さの統計的性質(<小特集>腐食防食)

概要

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Statistical characteristics of pitting corrosion observed under tubacular on carbon steel used forfresh water pipes are discussed. Thirty three cases were analysed using the statistical method. The Gausian distribution was applied for the distribution of pit depth in carbon steel. The mean and standard deviation of pit depth had no dependence on duration of use in practice. The standard deviation of pit depth rather than the mean is a good indicator for the estimation of potential occurrence of penetration. The index, m+3σ, is a good indicator for the occurrence of perforation. The standard deviation and mean of pit depth showed good correlation. It is difficult to estimate the life time of pipes using statistical analysis of pit depth because the law of pit growth is unclear.
社団法人日本材料学会の論文
1987-01-15