{"id":7944,"date":"2025-09-16T15:24:59","date_gmt":"2025-09-16T13:24:59","guid":{"rendered":"https:\/\/www.redhillballs.com\/?page_id=7944"},"modified":"2025-09-29T10:37:09","modified_gmt":"2025-09-29T08:37:09","slug":"esferas-de-ouro","status":"publish","type":"page","link":"https:\/\/www.redhillballs.com\/pt-pt\/produtos\/esferas-de-metais-nobres\/esferas-de-ouro\/","title":{"rendered":"Esferas de ouro"},"content":{"rendered":"<h2>\ud83d\udee0\ufe0f <a href=\"https:\/\/en.wikipedia.org\/wiki\/Gold\">Esferas de ouro \u2013 inertes, sem escurecimento, altamente condutoras<\/a><\/h2>\n<p>As esferas de ouro oferecem resist\u00eancia \u00e0 corros\u00e3o incompar\u00e1vel e confiabilidade de contato em ambientes exigentes. Com excelente condutividade el\u00e9trica, comportamento n\u00e3o magn\u00e9tico e sem fa\u00edscas, e uma superf\u00edcie naturalmente inerte que n\u00e3o escurece, s\u00e3o ideais para contactos de precis\u00e3o, dosagem e sistemas de fluidos de alta pureza onde \u00e9 preciso evitar contamina\u00e7\u00e3o e oxida\u00e7\u00e3o.<\/p>\n<h3>\ud83d\udd27 Especifica\u00e7\u00f5es t\u00e9cnicas principais<\/h3>\n<ul>\n<li><strong>Composi\u00e7\u00e3o<\/strong>: Au \u226599,9% (24K) ou ligas de ouro duro (p. ex., Au\u2013Ni \/ Au\u2013Co) para maior resist\u00eancia ao desgaste<\/li>\n<li><strong>Estrutura<\/strong>: metal nobre CFC (FCC); gr\u00e3o fino para alta qualidade superficial<\/li>\n<li><strong>Dureza<\/strong>: ~25\u201335 HV para Au puro; ~60\u2013150 HV para ligas de ouro duro (dependente da condi\u00e7\u00e3o)<\/li>\n<li><strong>Densidade<\/strong>: ~19,3 g\/cm\u00b3<\/li>\n<li><strong>El\u00e9trico<\/strong>: ~70\u201375% IACS; resistividade ~2,4\u20132,5 \u00b5\u03a9\u00b7cm<\/li>\n<li><strong>Corros\u00e3o<\/strong>: excelente; resistente a oxida\u00e7\u00e3o\/sulfida\u00e7\u00e3o \u2014 evitar \u00e1gua-r\u00e9gia e certos meios halogenantes<\/li>\n<li><strong>Magn\u00e9tico<\/strong>: n\u00e3o magn\u00e9ticas; <strong>sem fa\u00edscas<\/strong><\/li>\n<li><strong>Ponto de fus\u00e3o<\/strong>: ~1064 \u00b0C<\/li>\n<\/ul>\n<h3>\u2705 Vantagens<\/h3>\n<ul>\n<li><strong>Inertes &amp; sem escurecimento<\/strong>: resist\u00eancia de contacto est\u00e1vel ao longo do tempo<\/li>\n<li><strong>Funcionamento limpo<\/strong>: superf\u00edcie lisa, baixo atrito<\/li>\n<li><strong>Biocompat\u00edveis<\/strong>: adequadas para instrumenta\u00e7\u00e3o sens\u00edvel<\/li>\n<li><strong>N\u00e3o magn\u00e9ticas &amp; sem fa\u00edscas<\/strong><\/li>\n<\/ul>\n<h3>\ud83d\udd04 Aplica\u00e7\u00f5es de esferas de ouro<\/h3>\n<ul>\n<li><strong>Contactos el\u00e9tricos &amp; aparelhagem<\/strong>: resist\u00eancia de contacto baixa e est\u00e1vel<\/li>\n<li><strong>V\u00e1lvulas de precis\u00e3o &amp; dosagem<\/strong>: meios de alta pureza e n\u00e3o reativos<\/li>\n<li><strong>Instrumenta\u00e7\u00e3o &amp; sensores<\/strong>: elementos rolantes\/vedantes anticorros\u00e3o<\/li>\n<li><strong>Mecanismos de luxo\/decorativos<\/strong>: est\u00e9tica e desempenho funcional<\/li>\n<\/ul>\n<h3>\ud83d\udce6 Graus &amp; tamanhos dispon\u00edveis<\/h3>\n<ul>\n<li><a href=\"https:\/\/www.redhillballs.com\/company\/precision-grades\/\"><strong>Graus<\/strong>: ISO 3290, DIN 5401, AFBMA (toler\u00e2ncias equivalentes)<\/a><\/li>\n<li><strong>Intervalo de di\u00e2metros<\/strong>: tamanhos padr\u00e3o em polegadas e m\u00e9tricos; tamanhos n\u00e3o padr\u00e3o\/personalizados mediante solicita\u00e7\u00e3o<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udee0\ufe0f Esferas de ouro \u2013 inertes, sem escurecimento, altamente condutoras As esferas de ouro oferecem resist\u00eancia \u00e0 corros\u00e3o incompar\u00e1vel e confiabilidade de contato em ambientes exigentes. Com excelente condutividade el\u00e9trica, comportamento n\u00e3o magn\u00e9tico e sem fa\u00edscas, e uma superf\u00edcie naturalmente inerte que n\u00e3o escurece, s\u00e3o ideais para contactos de precis\u00e3o, dosagem e sistemas de fluidos [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":9196,"parent":7924,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-7944","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Esferas de ouro \u2013 condutividade e resist\u00eancia<\/title>\n<meta name=\"description\" content=\"Esferas de ouro oferecem excelente resist\u00eancia \u00e0 corros\u00e3o, condutividade el\u00e9trica e alta precis\u00e3o em aplica\u00e7\u00f5es t\u00e9cnicas e industriais\" \/>\n<meta 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