The Iron and steel magazine . -aerated fresh water ) at ordinary (b) Immersion in 50 per cent sulphuric acid > tests under (a) were carried out to get some idea of the extent of fresh-water corrosion under natural conditions;those under (b) to enable a comparison to be made with thebehavior of low carbon nickel-iron alloys. Fresh-Water Corrosion Tests.—The specimens weighed about70 to 80 grams each. Thev were suspended by string in sepa-rate glass pots filled with water. The latter was renovated each Iron Nickel-Manganese-Carbon Alloys too day, and the film of brown hydrate
The Iron and steel magazine . -aerated fresh water ) at ordinary (b) Immersion in 50 per cent sulphuric acid > tests under (a) were carried out to get some idea of the extent of fresh-water corrosion under natural conditions;those under (b) to enable a comparison to be made with thebehavior of low carbon nickel-iron alloys. Fresh-Water Corrosion Tests.—The specimens weighed about70 to 80 grams each. Thev were suspended by string in sepa-rate glass pots filled with water. The latter was renovated each Iron Nickel-Manganese-Carbon Alloys too day, and the film of brown hydrate gently brushed off. Thepots stood beside an open window, night and day. Duration ni test, 32 daws. At the completion of the test, the brown scale was removedas far as possible by careful rubbing with fine emery bars were heated for i£ hours at no° C. to 1 200 C, - 2300F. to 2480 F.,—allowed to cool in a desiccator and losses in weight ranged from .07 to .1 of a gram. Thejper- —Impact 10:kel per cent. centage losses ranged from .15 to .09 per cent. The differencesfound are very slight, but they tend to show that from 12 percent nickel upwards the tendency to corrode under these condi-tions diminishes. Sea-Water Corrosion Tests. — These were carried out underconditions similar to those described for the fresh-water corro-sion tests. The duration of the test was thirty-three days, andthe sea water was changed once a week. The losses in weightvaried from .11 to .22 of a gram. The percentage losses are I IO The Iron and Steel Magazine about twice as great as in the case of the fresh-water tests, andthey agree with the latter in indicating that up to .12 per centnickel no marked difference of behavior is exhibited by thealloys, and that with higher percentages of nickel the tendencyto corrode is less marked. Acid Corrosion Tests.—The bars used in the previous experi-ments were afterwards immersed, each in a separate trough,and supported
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Keywords: ., bookcentury1800, bookdecade1890, bookidironsteel, booksubjectiron
