Abstract
The corrosion behavior of RAFM JLF-1 (Fe–9Cr–2W) steel in static N-added Li (0.5wt.%N) at 600°C for times up to 750h was investigated. The kinetics of weight change and peculiarities of corrosion interaction were determined. Samples showed intensive weight losses during first 120h while with an exposure time the weight losses became slower. Corrosion attack proceeded most intensively along the boundaries of prior austenitic grains, martensite packets and laths, causing formation of the extremely relief surface. The porous and softened ferrite zone depleted markedly in Cr was formed beneath the relief surface. The martensite to ferrite transformation occurred in this zone. The weight losses of steel in N-added Li were about 25 times higher than those in “pure” Li (0.004wt.%N) under the same time–temperature conditions of tests. The scheme of corrosion interaction in “JLF-1 steel–Li[N]” system was proposed.
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