{"id":8803,"date":"2026-08-05T06:26:20","date_gmt":"2026-08-05T06:26:20","guid":{"rendered":"https:\/\/keertek.com\/?p=8803"},"modified":"2026-08-05T06:26:21","modified_gmt":"2026-08-05T06:26:21","slug":"removal-of-heavy-oil-deposits-and-grinding-sludge-from-hydraulic-cylinder-flanges","status":"publish","type":"post","link":"https:\/\/keertek.com\/fr\/removal-of-heavy-oil-deposits-and-grinding-sludge-from-hydraulic-cylinder-flanges\/","title":{"rendered":"\u00c9limination des d\u00e9p\u00f4ts d'huile lourde et des boues de meulage sur les brides des v\u00e9rins hydrauliques"},"content":{"rendered":"<p><strong>Une grande bride de v\u00e9rin hydraulique provenant d'une excavatrice utilis\u00e9e dans une mine \u00e0 ciel ouvert a constitu\u00e9 l'un des d\u00e9fis de nettoyage les plus difficiles auxquels le laboratoire de Keertek ait jamais \u00e9t\u00e9 confront\u00e9 : de la graisse \u00e9paisse et compact\u00e9e, m\u00e9lang\u00e9e \u00e0 de la poussi\u00e8re min\u00e9rale et \u00e0 des particules d'usure m\u00e9tallique.<\/strong><\/p>\n\n\n\n<p>Les al\u00e9sages filet\u00e9s et les rainures d'\u00e9tanch\u00e9it\u00e9 de la bride ont \u00e9t\u00e9 remplis d'un composite durci \u00e0 base de graisse et de sable, r\u00e9sistant au trempage dans des solvants classiques. Keertek a test\u00e9 un <strong>syst\u00e8me \u00e0 ultrasons \u00e0 double fr\u00e9quence<\/strong>&nbsp;\u00e0 l'aide d'un d\u00e9graissant industriel \u00e0 forte alcalinit\u00e9 chauff\u00e9 \u00e0 80 \u00b0C. La bande de basse fr\u00e9quence (28 kHz) a g\u00e9n\u00e9r\u00e9 une cavitation puissante permettant d'\u00e9liminer les contaminants en surface, tandis que la bande de haute fr\u00e9quence (68 kHz) a p\u00e9n\u00e9tr\u00e9 dans les filetages et les al\u00e9sages borgnes pour un nettoyage de pr\u00e9cision.<\/p>\n\n\n\n<p>Au bout de 25 minutes, toute la graisse et les particules avaient \u00e9t\u00e9 \u00e9limin\u00e9es. Les filetages \u00e9taient propres et intacts, et les surfaces d'\u00e9tanch\u00e9it\u00e9 ne pr\u00e9sentaient aucun signe de corrosion. La soci\u00e9t\u00e9 mini\u00e8re \u2014 qui exploite une flotte de plus de 40 pelles m\u00e9caniques \u2014 a demand\u00e9 une offre d\u00e9taill\u00e9e pour la mise en place d'une station de nettoyage sur site.<\/p>\n\n\n\n<p><strong>Proc\u00e9dure :<\/strong>&nbsp;Ultrasons \u00e0 double fr\u00e9quence, 80 \u00b0C | <strong>Substrat :<\/strong>&nbsp;Acier alli\u00e9 | <strong>Contaminant :<\/strong>&nbsp;Graisse \u00e9paisse, poussi\u00e8re min\u00e9rale, particules m\u00e9talliques<\/p>","protected":false},"excerpt":{"rendered":"<p>A large hydraulic cylinder flange from an open-pit mining excavator presented one of the toughest cleaning challenges Keertek&#8217;s lab has faced: thick, compacted grease mixed with mineral dust and metal wear particles. The flange&#8217;s threaded bores and seal grooves were packed with a hardened grease-sand composite that resisted conventional solvent soaking. Keertek tested a dual-frequency [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":8535,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[79],"tags":[],"class_list":["post-8803","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-case-study"],"acf":[],"_links":{"self":[{"href":"https:\/\/keertek.com\/fr\/wp-json\/wp\/v2\/posts\/8803","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/keertek.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/keertek.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/keertek.com\/fr\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/keertek.com\/fr\/wp-json\/wp\/v2\/comments?post=8803"}],"version-history":[{"count":0,"href":"https:\/\/keertek.com\/fr\/wp-json\/wp\/v2\/posts\/8803\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/keertek.com\/fr\/wp-json\/wp\/v2\/media\/8535"}],"wp:attachment":[{"href":"https:\/\/keertek.com\/fr\/wp-json\/wp\/v2\/media?parent=8803"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/keertek.com\/fr\/wp-json\/wp\/v2\/categories?post=8803"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/keertek.com\/fr\/wp-json\/wp\/v2\/tags?post=8803"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}