Corrosion of stainless and carbon steels in molten mixtures of industrial nitrates
Description/Abstract
Corrosion behavior of two stainless steels and carbon steel in mixtures of NaNO{sub 3} and KNO{sub 3} was evaluated to determine if impurities found in commodity grades of alkali nitrates aggravate corrosivity as applicable to an advanced solar thermal energy system. Corrosion tests were conducted for 7000 hours with Types 304 and 316 stainless steels at 570C and A36 carbon steel at 316C in seven mixtures of NaNO{sub 3} and KNO{sub 3} containing variations in impurity concentrations. Corrosion tests were also conducted in a ternary mixture of NaNO{sub 3}, KNO{sub 3}, and Ca(NO{sub 3}){sub 2}. Corrosion rates were determined by descaled weight losses while oxidation products were examined by scanning electron microscopy, electron microprobe analysis, and X-ray diffraction. The nitrate mixtures were periodically analyzed for changes in impurity concentrations and for soluble corrosion products.
| DOI | 10.2172/10141843 |
|---|---|
| Creator/Author: | Goods, S.H. ; Bradshaw, R.W. [Sandia National Labs., Livermore, CA (United States)] ; Prairie, M.R. ; Chavez, J.M. [Sandia National Labs., Albuquerque, NM (United States)] |
| Publication Date: | 1994 Mar 01 |
| OSTI Identifier: | OSTI ID: 10141843; Legacy ID: DE94009866 |
| Report Number(s): | SAND--94-8211 |
| DOE Contract Number: | AC04-94AL85000 |
| DOI: | 10.2172/10141843 |
| Other Number(s): | Other: ON: DE94009866; BR: GB0103012 |
| Resource Type: | Technical Report |
| Resource Relation: | Other Information: PBD: Mar 1994 |
| Coverage: | Topical |
| Research Org: | Sandia National Labs., Livermore, CA (United States) |
| Sponsoring Org: | USDOE, Washington, DC (United States) |
| Subject: | 36 MATERIALS SCIENCE; 14 SOLAR ENERGY; STAINLESS STEEL-304; CORROSION; STAINLESS STEEL-316; CARBON STEELS; POTASSIUM NITRATES; CORROSIVE EFFECTS; SODIUM NITRATES; MOLTEN SALTS; IMPURITIES; SOLAR THERMAL POWER PLANTS; CENTRAL RECEIVERS; DEMONSTRATION PLANTS |
| Country of Publication: | United States |
| Language: | English |
| Format: | Size: 37 p. |
| Availability: | OSTI as DE94009866; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov To purchase this media from NTIS, click here |
| Update Date: | 2010 Feb 18 |
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