{"created":"2023-06-19T10:26:32.461832+00:00","id":5130,"links":{},"metadata":{"_buckets":{"deposit":"ae01f3b7-76a7-4b47-8ffc-34641fd03958"},"_deposit":{"created_by":18,"id":"5130","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"5130"},"status":"published"},"_oai":{"id":"oai:muroran-it.repo.nii.ac.jp:00005130","sets":["41:227"]},"author_link":["22757"],"item_81_date_granted_17":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2014-09-25"}]},"item_81_degree_grantor_10":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_language":"ja","subitem_degreegrantor_name":"室蘭工業大学"},{"subitem_degreegrantor_language":"en","subitem_degreegrantor_name":"Muroran Institute of Technology"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"10103","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_81_degree_name_11":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士（工学）","subitem_degreename_language":"ja"}]},"item_81_description_25":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_81_description_7":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"本研究では，電気化学の基礎的な観点に立脚して，アルミニウムの表面処理によく使用されている硝酸，リン酸水溶液中のアルミニウムの腐食挙動の解析を試みた。分極曲線の解析手法の１つとして提案されている微分分極法（Differential Polarization Method）をアルミニウムの溶解挙動に適用し，その有効性を調べ，腐食速度や電気化学的なパラメーターを求めた。硝酸（HNO3）水溶液中のAl 1050試片の溶解反応は，速い系に属していた。微分分極法から得られる腐食電流密度はおよそ0.29mA cm−2となり，腐食重量から換算された値0.25 mA cm−2とほぼ一致した。リン酸（H3PO4）水溶液（室温）中のアルミニウムの腐食系のカソード半反応は非可逆系に属し，水素イオンの還元反応の律速素反応の透過係数βはおよそ0.5で電荷移動数nは1が得られた。微分分極法から得られた腐食速度はおよそ0.03mA cm−2となり，この値は重量減少から換算された腐食速度0.04 mA cm−2にほぼ一致した。次に，液温を変えた（液温303 K，313 K，323 K，333 K）リン酸水溶液中のアルミニウムの分極抵抗~電流密度曲線を解析した。液温303 K，313 Kにおいて水素イオンの還元反応の律速素反応式はH++e−→Hadと推測された。微分分極法より算出された腐食速度はそれぞれ約0.28 mA cm−2，0.30 mA cm−2で，実測した腐食量の電流密度換算値の0.30 mA cm−2，0.33 mA cm−2と近い値を示した。液温323 K，333 Kでのアルミニウムの溶解反応では，硝酸水溶液中のアルミニウムの溶解反応の様に速い系に属していた。腐食電流密度の理論値はそれぞれ0.3 mA cm−2，0.8 mA cm−2が得られた。硝酸水溶液中とリン酸水溶液中，または液温を変えたリン酸水溶液中でのアルミニウムの腐食速度を微分分極法を用いて推定できることを示した。","subitem_description_language":"ja","subitem_description_type":"Abstract"},{"subitem_description":"Attempts have been made to clarify polarization behavior and to estimate corrosion rates and electrochemical parameters of aluminum and its alloys in nitric acid (HNO3) solution and phosphoric acid (H3PO4) solution which are often used in the surface treatment of aluminum. The electrochemical parameters and corrosion rates were calculated by using the differential polarization method (DPM). It is shown that the dissolution of aluminum 1050 in nitric acid solution behaves in the fast system. The corrosion rate of 0.25 mA cm−2 obtained from the corrosion mass loss roughly corresponded to the corrosion current density of 0.29 mA cm−2 calculated by DPM. The cathode reaction of aluminum dissolution in phosphoric acid solution (298 K) behaves in the irreversible form. Transfer coefficient of rate-determining step for hydrogen ion reduction reaction is 0.5. The number of the charge transfer is 1. The current density calculated by DPM is 0.03 mA cm−2, which roughly coincided with the corrosion rate of 0.04 mA cm−2 from the corrosion weight loss. Polarization resistance-current density curve in phosphoric acid solution at 303 K, 313K, 323K and 333K have been analyzed. The rate-determining step for hydrogen ion reduction reaction at 303 K and 313 K is H++e−→Had. The corrosion rates are 0.28 mA cm−2 and 0.30 mA cm−2, respectively. Corrosion rates estimated by the DPM are roughly corresponding to the values 0.30 mA cm−2, 0.33 mA cm−2 which obtained from corrosion mass loss. Dissolution of aluminum at 323 K and 333 K of solution temperatures are categorized to electrochemical reaction of the fast system. And the estimated corrosion current densities are 0.3 mA cm−2 and 0.8 mA cm−2 respectively. Corrosion rates of aluminum in phosphoric acid solution, nitric solution, and phosphoric acid solution at various temperatures can be estimated by using DPM.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_81_dissertation_number_13":{"attribute_name":"学位授与番号","attribute_value_mlt":[{"subitem_dissertationnumber":"甲第365号"}]},"item_81_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15118/00005121","subitem_identifier_reg_type":"JaLC"}]},"item_81_subject_9":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"572","subitem_subject_scheme":"NDC"}]},"item_81_text_12":{"attribute_name":"学位の種別","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"課程博士"}]},"item_81_text_14":{"attribute_name":"報告番号","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"甲第365号"}]},"item_81_text_15":{"attribute_name":"学位記番号","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"博甲第365号"}]},"item_81_version_type_24":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorAffiliations":[{"affiliationNameIdentifiers":[],"affiliationNames":[{"affiliationName":""}]}],"creatorNames":[{"creatorName":"蘇, 蓓蓓","creatorNameLang":"ja"},{"creatorName":"SU, Beibei","creatorNameLang":"en"}],"familyNames":[{},{}],"givenNames":[{},{}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-02-15"}],"displaytype":"detail","filename":"A365.pdf","filesize":[{"value":"13.2 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"A365","objectType":"fulltext","url":"https://muroran-it.repo.nii.ac.jp/record/5130/files/A365.pdf"},"version_id":"d71a2093-bdf9-4151-a49a-55547682a9d3"},{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-02-15"}],"displaytype":"detail","filename":"A365_summary.pdf","filesize":[{"value":"459.8 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"A365_summary","objectType":"abstract","url":"https://muroran-it.repo.nii.ac.jp/record/5130/files/A365_summary.pdf"},"version_id":"d445d4e9-ef1c-451c-a6c8-1b27eab9f9a4"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"doctoral thesis","resourceuri":"http://purl.org/coar/resource_type/c_db06"}]},"item_title":"アルミニウムの表面処理に関する基礎的研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"アルミニウムの表面処理に関する基礎的研究","subitem_title_language":"ja"}]},"item_type_id":"81","owner":"18","path":["227"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2014-12-04"},"publish_date":"2014-12-04","publish_status":"0","recid":"5130","relation_version_is_last":true,"title":["アルミニウムの表面処理に関する基礎的研究"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2023-12-14T05:28:05.129661+00:00"}