Hot-salt corrosion of alloys PT-7M, 42ХНМ, Inconel 690, Incoloy 800

Abstract

The Article contains the results of the study performed for the samples made from alloys PT-7М, 42ХНМ, Inconel 690, Incoloy 800 for resistance against hot salt corrosion in the mixture of crystallized NaCl and KBr salts, in ratio 300:1 by weight, and in the temperature range from 150 °С to 300 °С, both in contact with the air and in a leak-tight autoclave in the atmosphere of saturated water steam. Regularities of hot salt corrosion behavior in the alloys under the study were detected under testing conditions. The atmosphere of saturated water steam inhibits development of halt salt corrosion of alloy ПТ-7М in the entire temperature range of the testing.

Corrosion Resistance of the Welded Joints From the Ultrafine-Grained Near-α Titanium Alloys Ti-5Al-2V Obtained by Spark Plasma Sintering

“…The testing was performed at the temperature 250 о C in the conditions of access of oxygen. The accuracy of the temperature stabilization was 5 о C. The testing was performed in laboratory autoclaves with the internal volume 3000 cm 3 providing an opportunity of the access of the ambient air (see [65]). Prior to the testing, the surfaces of the specimens underwent the mechanical polishing down to the roughness level of 3-5 μm.…”