{"_buckets": {"deposit": "af2cb4ff-f843-4df4-be37-51e376684289"}, "_deposit": {"created_by": 3, "id": "9935", "owners": [3], "pid": {"revision_id": 0, "type": "depid", "value": "9935"}, "status": "published"}, "_oai": {"id": "oai:iwate-u.repo.nii.ac.jp:00009935", "sets": ["1519"]}, "author_link": ["61744", "61745", "61743", "61742"], "item_16_biblio_info_7": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2006-01-01", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "5", "bibliographicPageEnd": "273", "bibliographicPageStart": "268", "bibliographicVolumeNumber": "49", "bibliographic_titles": [{"bibliographic_title": "Journal of the Japan Petroleum Institute"}]}]}, "item_16_date_6": {"attribute_name": "登録日", "attribute_value_mlt": [{"subitem_date_issued_datetime": "2010-02-18"}]}, "item_16_description_12": {"attribute_name": "Abstract", "attribute_value_mlt": [{"subitem_description": "Low viscosity base oils are one of the candidates for fuel saving lubricants for internal combustion engines. These lubricants reduce viscous friction under hydrodynamic conditions, so reduce total energy loss at tribological contact. However, these oils provide thinner oil films resulting in magnified wear. Therefore, wear protection of rubbing surfaces is very important to apply low viscosity oils in practice. Effects of phosphorus-containing additives on antiwear properties of low viscosity base oils were evaluated under boundary lubrication conditions using a four-ball type wear tester according to ASTM D 4172. For mineral based oils, dialkyl phosphonates considerably reduced wear whereas trialkyl and triaryl phosphonates did not. Compatibility of additive with mineral based oil depends on the refining process of the oil. Wear prevention by phosphorus-containing additive in solvent-extracted mineral oils was sometimes unpredictable. Additive response for hydrogen-refined mineral oils was better than that for solvent-extracted oils. The results showed good accordance with phosphorus contents on the worn surfaces obtained by surface analysis. At least 0.062 mass% (620 ppm) of phosphorus is required to achieve sufficient antiwear properties in hydrogen-refined mineral oils. Synthetic esters have good lubricity in comparison with mineral oils. However, conventional antiwear additives for mineral oils are not always effective for synthetic esters, especially low viscosity esters. Hydroxyalkyl phosphates, with a polar functional group in the molecule, reduced wear effectively even at 0.016 mass% (160 ppm) of phosphorus in low viscosity synthetic esters. The new additives provided boundary films with high phosphorus contents. Kinetics of the boundary film formation were examined by the electric contact resistance method. Formation of the boundary film from the new additives was higher than that from conventional additives. The replenishment process of the boundary film under dynamic conditions is very important for low viscosity lubricants.", "subitem_description_type": "Other"}]}, "item_16_publisher_14": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "The Japan Petroleum Institute"}]}, "item_16_rights_18": {"attribute_name": "権利", "attribute_value_mlt": [{"subitem_rights": "Copyright (c) 2006 by The Japan Petroleum Institute"}, {"subitem_rights": "本著作物の著作権は社団法人石油学会に帰属します。ご利用に当たっては著作権法ならびに社団法人石油学会 に従うことをお願いいたします。"}]}, "item_16_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "1346-8804", "subitem_source_identifier_type": "ISSN"}]}, "item_16_text_4": {"attribute_name": "著者(機関)", "attribute_value_mlt": [{"subitem_text_value": "Dept. of Chemical Engineering, Iwate University"}]}, "item_16_version_type_27": {"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_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "MINAMI, Ichiro"}], "nameIdentifiers": [{"nameIdentifier": "61742", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "MURAKAMI, Hiroyuki"}], "nameIdentifiers": [{"nameIdentifier": "61743", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "NANAO, Hidetaka"}], "nameIdentifiers": [{"nameIdentifier": "61744", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "MORI, Shigeyuki"}], "nameIdentifiers": [{"nameIdentifier": "61745", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2016-11-14"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "jjpi-v49n5p268-273.pdf", "filesize": [{"value": "2.1 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 2100000.0, "url": {"label": "jjpi-v49n5p268-273.pdf", "url": "https://iwate-u.repo.nii.ac.jp/record/9935/files/jjpi-v49n5p268-273.pdf"}, "version_id": "5d45658d-f72a-4a45-808f-4b1690b1f049"}]}, "item_keyword": {"attribute_name": "キーワード", "attribute_value_mlt": [{"subitem_subject": "Antiwear additive", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Phosphorus compound", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Synthetic ester", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Lubrication mechanism", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Tribo-chemistry", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Environmental lubricant", "subitem_subject_scheme": "Other"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "journal article", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "Additive Effect for Environmental Lubricants—Decreased Phosphorus Contents in Low Viscosity Base Oils for Antiwear Performance—", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Additive Effect for Environmental Lubricants—Decreased Phosphorus Contents in Low Viscosity Base Oils for Antiwear Performance—"}]}, "item_type_id": "16", "owner": "3", "path": ["1519"], "permalink_uri": "https://iwate-u.repo.nii.ac.jp/records/9935", "pubdate": {"attribute_name": "公開日", "attribute_value": "2010-02-18"}, "publish_date": "2010-02-18", "publish_status": "0", "recid": "9935", "relation": {}, "relation_version_is_last": true, "title": ["Additive Effect for Environmental Lubricants—Decreased Phosphorus Contents in Low Viscosity Base Oils for Antiwear Performance—"], "weko_shared_id": -1}