{"id":35511,"date":"2025-02-17T17:56:38","date_gmt":"2025-02-17T20:56:38","guid":{"rendered":"https:\/\/keltec.com.br\/?p=35511"},"modified":"2025-02-18T09:56:31","modified_gmt":"2025-02-18T12:56:31","slug":"como-a-temperatura-afeta-os-lubrificantes","status":"publish","type":"post","link":"https:\/\/keltec.com.br\/en\/como-a-temperatura-afeta-os-lubrificantes\/","title":{"rendered":"How Temperature Affects Lubricants"},"content":{"rendered":"<p>When it comes to lubricant temperature, there is a need for control and<br>moderation. Finding the right working temperature can extend the<br>performance and lubricant life. Of course, everything is easy to say, but in<br>practice can be difficult to do. <\/p>\n\n\n\n<p>Fluid temperature stability is essential for the success of systems<br>mechanical. All lubricating and hydraulic fluids have maximum limits and<br>minimum operating temperatures. The machine loses stability and may fail<br>when the fluid exceeds these limits. If this problem is not treated, the<br>failures result in degradation of materials and machine components.<\/p>\n\n\n\n<p>In cold weather, lubricants can chemically degrade, separate into phases and<br>present altered physical states.<\/p>\n\n\n\n<p>Some examples of the consequences of cold on the lubricant:<br>\u00b7 \u201cBlended\u201d base oils may begin to separate into phases.<br>\u00b7 Paraffinic base oils can become wax gels.<br>\u00b7 Some additives may become insoluble resulting in sedimentation.<br>\u00b7 Dissolved water can turn into emulsified water (more harmful).<br>\u00b7 Many additives that rely on heat-induced chemical reactions do not<br>are able to act (e.g. EP and AW additives).<br>\u00b7 The oil may become more viscous to circulate and the grease more consistent.<br>\u00b7 Filters with by-pass open the valve due to the increase in viscosity of the<br>oil.<\/p>\n\n\n\n<p>In 1903, Svante Arrhenius won a Nobel Prize when he discovered the<br>relationship between temperature and chemical reaction rates. The so-called \u201crate rule\u201d<br>Arrhenius\u201d, refers to the fact that chemical reactions double the reaction rate to<br>every 10\u00b0C increase in temperature. And it&#039;s no different with lubricants. A<br>Once the base activation temperature has been exceeded, the lubricant will<br>degrade (oxidize) twice as fast for every 10\u00b0C (18\u00b0F) increase in<br>temperature. In fact, there are a number of problems associated with excess<br>heat. <\/p>\n\n\n\n<p>Note: The planet&#039;s temperature is on average 2\u00baC above historical measurements and its effects are being felt in all equipment where these variations are crucial for its correct functioning. The above observation was published in 2021. Now, in 2025, some publications indicate that the planet&#039;s average temperature is on average 5\u00baC above historical measurements and its effects are being felt much more in all equipment where these variations are crucial for its correct functioning.<\/p>\n\n\n\n<p><strong>Some examples of the consequences of high temperatures on the lubricant:<\/strong><br>\u00b7 Accelerates decomposition of oil additive (Arrhenius).<br>\u00b7 Some additives will volatilize and escape into the atmosphere.<br>\u00b7 Consumes IV more quickly.<br>\u00b7 Microbial contaminants prefer warmer temperatures (but not<br>boiling).<br>\u00b7 Heat thins the oil film, causing accelerated wear.<br>\u00b7 Hot oil shortens the life of filters and seals and accelerates corrosion.<br>\u00b7 Both oils and greases are more prone to leaks.<br>\u00b7 Grease separates oil from thickener at high temperatures.<br>\u00b7 High temperatures can form carbonaceous and surface resins.<\/p>\n\n\n\n<p><strong>Measuring the temperature of your oil:<\/strong><\/p>\n\n\n\n<p>Of course, temperature plays a vital role in monitoring the<br>machine condition and that is why today many Maintenance systems<br>Predictive have alarms for temperatures. Just as we need to check<br>our temperature to know if we have a fever, most of the problems<br>with lubrication, friction and wear will have a temperature profile. So,<br>in this sense, the change in temperature is good, as we can detect that<br>something is wrong and we must take quick action.<\/p>\n\n\n\n<p>Creating a temperature measurement route at the most critical points helps to maintain<br>a good sensitive inspection program.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Develop temperature limit tables for the most critical equipment,<br>defining the temperatures from point A to F for the specific location where the equipment<br>to be monitored is located (e.g. production line)<\/li>\n\n\n\n<li>The normal operating range (Zone 3) is limited by points C and D. Variations in<br>temperature below point C are controlled by a heater and alarms. The<br>temperatures above the D line are controlled by coolers and alarms.<\/li>\n\n\n\n<li>Constant operation in zones 2 and\/or 4 reduces the life of the equipment and\/or<br>lubricant. Operating in zone 2 may slow the flow of lubricant to the bearings,<br>increase energy consumption and increase the tendency to foam. Operate in zone 4<br>can accelerate oil oxidation, reduce the strength of the lubricating film and increase the<br>wear associated with particles.<\/li>\n\n\n\n<li>Operating in zones 1 and\/or 5 threatens machine reliability. Temperatures in<br>extreme points A and F can cause sudden death of the machine. Zone 1 is a<br>condition that typically leads to severe lubricant starvation and zone 5 is associated with hazards related to fire, oil degradation, additive depletion,<br>volatilization and high friction and wear conditions. <\/li>\n\n\n\n<li>The use of synthetic or high IV lubricants helps in areas where there is low or high temperature.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"664\" height=\"168\" src=\"https:\/\/keltec.com.br\/wp-content\/uploads\/2025\/02\/image.jpg\" alt=\"\" class=\"wp-image-35514\" srcset=\"https:\/\/keltec.com.br\/wp-content\/uploads\/2025\/02\/image.jpg 664w, https:\/\/keltec.com.br\/wp-content\/uploads\/2025\/02\/image-300x76.jpg 300w, https:\/\/keltec.com.br\/wp-content\/uploads\/2025\/02\/image-18x5.jpg 18w, https:\/\/keltec.com.br\/wp-content\/uploads\/2025\/02\/image-600x152.jpg 600w\" sizes=\"(max-width: 664px) 100vw, 664px\" \/><\/figure>\n<\/div>\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Quando se trata da temperatura do lubrificante, h\u00e1 uma necessidade de controle emodera\u00e7\u00e3o. Encontrar a temperatura certa de trabalho pode estender odesempenho e vida \u00fatil do lubrificante. \u00c9 claro que tudo \u00e9 f\u00e1cil de dizer, mas napr\u00e1tica pode ser dif\u00edcil de fazer. A estabilidade na temperatura dos fluidos \u00e9 essencial para o sucesso dos sistemasmec\u00e2nicos. [&hellip;]<\/p>","protected":false},"author":4,"featured_media":35513,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-35511","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/keltec.com.br\/en\/wp-json\/wp\/v2\/posts\/35511","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/keltec.com.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/keltec.com.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/keltec.com.br\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/keltec.com.br\/en\/wp-json\/wp\/v2\/comments?post=35511"}],"version-history":[{"count":0,"href":"https:\/\/keltec.com.br\/en\/wp-json\/wp\/v2\/posts\/35511\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/keltec.com.br\/en\/wp-json\/wp\/v2\/media\/35513"}],"wp:attachment":[{"href":"https:\/\/keltec.com.br\/en\/wp-json\/wp\/v2\/media?parent=35511"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/keltec.com.br\/en\/wp-json\/wp\/v2\/categories?post=35511"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/keltec.com.br\/en\/wp-json\/wp\/v2\/tags?post=35511"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}