{"id":688,"date":"2026-06-29T15:04:30","date_gmt":"2026-06-29T15:04:30","guid":{"rendered":"https:\/\/nuevachem.com\/?p=688"},"modified":"2026-06-29T15:19:50","modified_gmt":"2026-06-29T15:19:50","slug":"surface-tension-and-capillary-penetration","status":"publish","type":"post","link":"https:\/\/nuevachem.com\/fa\/surface-tension-and-capillary-penetration\/","title":{"rendered":"Surface Tension and Capillary Penetration"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"688\" class=\"elementor elementor-688\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b7fcddf e-con-full e-flex e-con e-parent\" data-id=\"b7fcddf\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-88ebfef e-con-full e-flex e-con e-child\" data-id=\"88ebfef\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e061638 elementor-widget elementor-widget-heading\" data-id=\"e061638\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Surface Tension and Capillary Penetration<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-838f8c9 e-con-full e-flex e-con e-child\" data-id=\"838f8c9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8185207 elementor-widget elementor-widget-text-editor\" data-id=\"8185207\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>How Leak Detectors Really Work<\/p><p>We\u2019ve previously mentioned that the leak detector liquid\u2019s penetration into fine weld cracks results from its low surface tension. But here\u2019s a point worth digging into: why does capillary penetration get stronger as a crack gets narrower?<\/p><p>The Relationship Between Crack Width and Penetration Power<\/p><p>When a liquid with low surface tension reaches a very narrow gap, the adhesive force between the liquid and the crack walls overcomes the liquid\u2019s internal cohesive force, drawing it into the gap without any need for external pressure, much like ink soaking into paper fibers. The narrower the gap, the stronger this pulling force becomes. This is precisely why microscopic cracks invisible to the naked eye are exactly where the leak detector liquid performs best at penetration.<\/p><p>The Formulation Challenge: A Delicate Balance<\/p><p>If surface tension isn\u2019t low enough, fine defects, often the earliest signs of structural failure, go undetected. On the other hand, reducing this property too much can compromise the formula\u2019s overall stability or its ability to carry the fluorescent compound. Striking this precise balance is one of the key technical challenges in designing a high-quality leak detector.<\/p><p>\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Surface Tension and Capillary Penetration How Leak Detectors Really Work We\u2019ve previously mentioned that the leak detector liquid\u2019s penetration into [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":310,"comment_status":"open","ping_status":"open","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[41],"tags":[],"class_list":["post-688","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-scientific-technical"],"_links":{"self":[{"href":"https:\/\/nuevachem.com\/fa\/wp-json\/wp\/v2\/posts\/688","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nuevachem.com\/fa\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nuevachem.com\/fa\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nuevachem.com\/fa\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nuevachem.com\/fa\/wp-json\/wp\/v2\/comments?post=688"}],"version-history":[{"count":7,"href":"https:\/\/nuevachem.com\/fa\/wp-json\/wp\/v2\/posts\/688\/revisions"}],"predecessor-version":[{"id":705,"href":"https:\/\/nuevachem.com\/fa\/wp-json\/wp\/v2\/posts\/688\/revisions\/705"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nuevachem.com\/fa\/wp-json\/wp\/v2\/media\/310"}],"wp:attachment":[{"href":"https:\/\/nuevachem.com\/fa\/wp-json\/wp\/v2\/media?parent=688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nuevachem.com\/fa\/wp-json\/wp\/v2\/categories?post=688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nuevachem.com\/fa\/wp-json\/wp\/v2\/tags?post=688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}