{"id":150058,"date":"2024-10-19T08:50:59","date_gmt":"2024-10-19T08:50:59","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/astm-d7542-2015\/"},"modified":"2024-10-25T01:07:21","modified_gmt":"2024-10-25T01:07:21","slug":"astm-d7542-2015","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/astm\/astm-d7542-2015\/","title":{"rendered":"ASTM-D7542 2015"},"content":{"rendered":"

ASTM D7542-15<\/h3>\n

Historical Standard: Standard Test Method for Air Oxidation of Carbon and Graphite in the Kinetic Regime<\/h4>\n
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ASTM D7542<\/h4>\n

Scope<\/strong><\/p>\n

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1.1<\/span> This test method recommends a standard procedure for measuring oxidation rates in air of various grades of nuclear graphite and\/or manufactured carbon. Following the standard procedure recommended here, one can obtain kinetic parameters that characterize the oxidation resistance of tested materials and that can be used to for materials selection and qualification, and for quality control purposes in the fabrication process.<\/p>\n<\/p><\/div>\n

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1.2<\/span> This test method covers the rate of oxidative weight loss per exposed nominal geometric surface area, or per initial weight of machined test specimens of standard size and shape, or both. The test is valid in the temperature range where the rate of air oxidation of graphite and manufactured carbon is limited by reaction kinetics.<\/p>\n<\/p><\/div>\n

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1.3<\/span> This test method also provides a standard oxidation temperature (as defined in 3.1.7<\/span>), and the kinetic parameters of the oxidation reaction, namely the activation energy and the logarithm of pre-exponential factor in Arrhenius equation. The kinetic parameters of Arrhenius equation are calculated from the temperature dependence of oxidation rates measured over the temperature range where Arrhenius plots (as defined in 3.1.8<\/span>) are linear, which is defined as the \u201ckinetic\u201d or \u201cchemical control\u201d oxidation regime. For typical nuclear grade graphite materials it was found that the practical range of testing temperatures is from about 500\u2009\u00b0C to 550\u2009\u00b0C up to about 700\u2009\u00b0C to 750\u2009\u00b0C.<\/p>\n<\/p><\/div>\n

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1.4<\/span> The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.<\/p>\n<\/p><\/div>\n

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1.5<\/span> This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.<\/i><\/p>\n<\/p><\/div>\n

Keywords<\/strong><\/p>\n

activation energy; air; carbon; graphite; kinetic regime; oxidation rate; pre-exponential factor; standard oxidation temperature; temperature;<\/p>\n

ICS Code<\/strong><\/p>\n

ICS Number Code 71.060.10 (Chemical elements)<\/p>\n

DOI:<\/strong> 10.1520\/D7542-15<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

D7542-15 Standard Test Method for Air Oxidation of Carbon and Graphite in the Kinetic Regime<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASTM<\/b><\/a><\/td>\n2015<\/td>\n12<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":150063,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1005,2637],"product_tag":[],"class_list":{"0":"post-150058","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-71-060-10","7":"product_cat-astm","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/150058","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/150063"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=150058"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=150058"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=150058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}