Corrosion resistance of inconel 690 to sodium carbonate, calcium carbonate, and sodium meta silicate at 900 and 1100{degrees}C

Content Provider	United States Department of Energy Office of Scientific and Technical Information (OSTI.GOV)
Author	Imrich, K. J.
Organization	Westinghouse Savannah River Co., Aiken, SC (United States)
Abstract	Corrosive attack of Inconel 690 coupons was not observed following 3 day exposure tests to calcium carbonate, sodium carbonate, and sodium meta silicate at 900 {degrees}C. However, melt line attack was evident on coupons exposed to sodium meta silicate and sodium carbonate tested for 3 days at 1100 {degrees}C. In addition, intergranular attack (IGA), approximately 0.67 mils/day, was observed on the Inconel 690 coupon exposed to calcium carbonate at 1100 {degrees}C. Calcium carbonate did not completely remove the glass coating at 950 {degrees}C. In fact, it was comparable to the results obtained by exposing a glass coated coupon at 950 {degrees}C in air. Therefore, calcium carbonate is not recommended for cleaning the DWPF melter pour spout. Both sodium carbonate and sodium meta silicate appear to remove most of the glass. However, these cleaning agents will remain on the metal surface following exposure at 950 {degrees}C resulting in very rough surface and a potential for corrosive attack when heated to 1100 {degrees}C.
Sponsorship	USDOE, Washington, DC (United States)
Related Links	https://www.osti.gov/biblio/522753
Page Count	9
File Format	PDF
DOI	10.2172/522753
Language	English
Publisher Date	1997-01-29
Publisher Place	United States
Access Restriction	Open
Subject Keyword	MATERIALS SCIENCE INCONEL 690 CORROSION RESISTANCE CALCIUM CARBONATES SODIUM CARBONATES SODIUM SILICATES INTERGRANULAR CORROSION TEMPERATURE DEPENDENCE
Content Type	Text
Resource Type	Technical Report