{"id":4337,"date":"2025-12-31T03:20:01","date_gmt":"2025-12-31T03:20:01","guid":{"rendered":"https:\/\/pergolalights.net\/?p=4337"},"modified":"2026-04-03T07:44:23","modified_gmt":"2026-04-03T07:44:23","slug":"salt-spray-test-24-hours-to-years-conversion","status":"publish","type":"post","link":"https:\/\/pergolalights.net\/pt\/salt-spray-test-24-hours-to-years-conversion\/","title":{"rendered":"A quantos anos corresponde um ensaio de 24 horas de n\u00e9voa salina?"},"content":{"rendered":"<div class=\"row align-center\"  id=\"row-441000318\">\n\n\t<div id=\"col-1210183596\" class=\"col medium-11 small-12 large-11\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div id=\"gap-465257066\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-465257066 {\n  padding-top: 100px;\n}\n<\/style>\n\t<\/div>\n\t\n<div class=\"row\"  id=\"row-1265590458\">\n\n\t<div id=\"col-822796570\" class=\"col small-12 large-12\"  >\n\t\t\t\t<div class=\"col-inner text-center\" style=\"background-color:#bc7d4a;\" >\n\t\t\t\n\t\t\t\n\t<div id=\"text-311346401\" class=\"text\">\n\t\t\n<h2>A quantos anos corresponde um teste de 24 horas de n\u00e9voa salina?<\/h2>\n\t\t\n<style>\n#text-311346401 {\n  font-size: 0.75rem;\n  color: rgb(255, 255, 255);\n}\n#text-311346401 > * {\n  color: rgb(255, 255, 255);\n}\n@media (min-width:550px) {\n  #text-311346401 {\n    font-size: 1.1rem;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-822796570 > .col-inner {\n  padding: 60px 0px 48px 0px;\n  border-radius: 7px;\n}\n<\/style>\n\t<\/div>\n\n\t\n<\/div>\n\t<div id=\"text-2284664120\" class=\"text\">\n\t\t\n<h3>As convers\u00f5es espec\u00edficas de tempo s\u00e3o as seguintes:<\/h3>\n\t\t\n<style>\n#text-2284664120 {\n  font-size: 0.75rem;\n  line-height: 1.75;\n}\n@media (min-width:550px) {\n  #text-2284664120 {\n    font-size: 1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-3793717120\" class=\"text\">\n\t\t\n<ul>\n<li>Ensaio de proje\u00e7\u00e3o salina neutra 24h \u21cc Ambiente natural 1 ano;<\/li>\n<li>Ensaio de proje\u00e7\u00e3o de sal de \u00e1cido ac\u00e9tico 24h \u21cc Ambiente natural 3 anos;<\/li>\n<li>Teste de pulveriza\u00e7\u00e3o de sal de \u00e1cido ac\u00e9tico acelerado por cobre 24h \u21cc Ambiente natural 8 anos.<\/li>\n<\/ul>\n\t\t\n<style>\n#text-3793717120 {\n  font-size: 0.75rem;\n  line-height: 1.75;\n}\n@media (min-width:550px) {\n  #text-3793717120 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-1765266772\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-1765266772 {\n  padding-top: 30px;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-4136225727\" class=\"text\">\n\t\t\n<h3>\ud83d\udd0d An\u00e1lise\uff1a<\/h3>\n\t\t\n<style>\n#text-4136225727 {\n  font-size: 0.75rem;\n  line-height: 1.75;\n}\n@media (min-width:550px) {\n  #text-4136225727 {\n    font-size: 1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-2172808673\" class=\"text\">\n\t\t\n<p>A corros\u00e3o refere-se \u00e0 deteriora\u00e7\u00e3o ou degrada\u00e7\u00e3o dos materiais ou das suas propriedades causada por factores ambientais. A maior parte da corros\u00e3o ocorre em ambientes atmosf\u00e9ricos, que cont\u00eam componentes corrosivos e factores como o oxig\u00e9nio, a humidade, as flutua\u00e7\u00f5es de temperatura e os poluentes. A corros\u00e3o por proje\u00e7\u00e3o salina representa uma das formas mais prevalecentes e destrutivas de corros\u00e3o atmosf\u00e9rica. Aqui, \u201cn\u00e9voa salina\u201d refere-se a uma atmosfera rica em cloretos, sendo o seu principal componente corrosivo o sal de cloreto marinho \u201ccloreto de s\u00f3dio\u201d. Este cloreto tem origem principalmente nos oceanos e nas regi\u00f5es salinas do interior.<\/p>\n\t\t\n<style>\n#text-2172808673 {\n  font-size: 0.75rem;\n  line-height: 1.75;\n}\n@media (min-width:550px) {\n  #text-2172808673 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-3627638257\" class=\"text\">\n\t\t\n<p>1. Conceito de ensaio de n\u00e9voa salina<\/p>\n<p>O ensaio de proje\u00e7\u00e3o salina \u00e9 um ensaio ambiental que utiliza principalmente condi\u00e7\u00f5es artificiais de proje\u00e7\u00e3o salina simulada criadas por equipamento de ensaio de proje\u00e7\u00e3o salina para avaliar a resist\u00eancia \u00e0 corros\u00e3o de produtos ou materiais met\u00e1licos.<\/p>\n\t\t\n<style>\n#text-3627638257 {\n  font-size: 0.75rem;\n  line-height: 1.75;\n}\n@media (min-width:550px) {\n  #text-3627638257 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1453988817\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1214\" height=\"669\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/12\/The-Concept-of-Salt-Spray-Testing.webp\" class=\"attachment-original size-original\" alt=\"The Concept of Salt Spray Testing\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/12\/The-Concept-of-Salt-Spray-Testing.webp 1214w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/12\/The-Concept-of-Salt-Spray-Testing-726x400.webp 726w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/12\/The-Concept-of-Salt-Spray-Testing-768x423.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/12\/The-Concept-of-Salt-Spray-Testing-18x10.webp 18w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/12\/The-Concept-of-Salt-Spray-Testing-510x281.webp 510w\" sizes=\"auto, (max-width: 1214px) 100vw, 1214px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1453988817 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-2728718689\" class=\"text\">\n\t\t\n<p>A maior parte da corros\u00e3o dos materiais met\u00e1licos ocorre em ambientes atmosf\u00e9ricos, que cont\u00eam componentes corrosivos e factores como o oxig\u00e9nio, a humidade, as flutua\u00e7\u00f5es de temperatura e os poluentes. A corros\u00e3o por proje\u00e7\u00e3o salina representa uma das formas mais comuns e destrutivas de corros\u00e3o atmosf\u00e9rica.<\/p>\n\t\t\n<style>\n#text-2728718689 {\n  font-size: 0.75rem;\n  line-height: 1.75;\n}\n@media (min-width:550px) {\n  #text-2728718689 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-2887927918\" class=\"text\">\n\t\t\n<p>Salt spray corrodes metal materials primarily through the penetration of conductive salt solutions into the metal, triggering electrochemical reactions. This forms a micro-battery system comprising \u201clow-potential metal\u2014electrolyte solution\u2014high-potential impurities,\u201d facilitating electron transfer. The metal, acting as the anode, dissolves and forms new compounds\u2014the corrosion products. Chloride ions play a primary role in the salt spray corrosion process. They possess strong penetrating ability, easily penetrating metal oxide layers to enter the metal interior and disrupt the metal&#8217;s passivation state. Simultaneously, chloride ions have low hydration energy, readily adsorbing onto metal surfaces and displacing oxygen from the protective oxide layer, thereby causing metal damage.<\/p>\n\t\t\n<style>\n#text-2887927918 {\n  font-size: 0.75rem;\n  line-height: 1.75;\n}\n@media (min-width:550px) {\n  #text-2887927918 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-6624223\" class=\"text\">\n\t\t\n<ol start=\"2\">\n<li>Classifica\u00e7\u00e3o dos ensaios de proje\u00e7\u00e3o salina<\/li>\n<\/ol>\n<p>Salt spray tests fall into two main categories: natural environmental exposure tests and artificial accelerated simulated salt spray environment tests. Artificial simulated salt spray environment tests utilize a test chamber\u2014a device with a specific volume\u2014to artificially create a salt spray environment within its space. This environment is used to evaluate the quality of a product&#8217;s resistance to salt spray corrosion.<\/p>\n\t\t\n<style>\n#text-6624223 {\n  font-size: 0.75rem;\n  line-height: 1.75;\n}\n@media (min-width:550px) {\n  #text-6624223 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_151132648\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1197\" height=\"600\" src=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/12\/Classification_of_Salt_Spray_Tests.webp\" class=\"attachment-original size-original\" alt=\"Classification_of_Salt_Spray_Tests\" srcset=\"https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/12\/Classification_of_Salt_Spray_Tests.webp 1197w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/12\/Classification_of_Salt_Spray_Tests-798x400.webp 798w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/12\/Classification_of_Salt_Spray_Tests-768x385.webp 768w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/12\/Classification_of_Salt_Spray_Tests-18x9.webp 18w, https:\/\/pergolalights.net\/wp-content\/uploads\/2025\/12\/Classification_of_Salt_Spray_Tests-510x256.webp 510w\" sizes=\"auto, (max-width: 1197px) 100vw, 1197px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_151132648 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"text-2206677146\" class=\"text\">\n\t\t\n<p>Em compara\u00e7\u00e3o com ambientes naturais, a concentra\u00e7\u00e3o de cloreto de sal em ambientes artificiais de proje\u00e7\u00e3o salina pode ser v\u00e1rias a dezenas de vezes superior aos n\u00edveis t\u00edpicos de proje\u00e7\u00e3o salina natural, acelerando significativamente as taxas de corros\u00e3o. A realiza\u00e7\u00e3o de testes de proje\u00e7\u00e3o salina em produtos produz, assim, resultados muito mais r\u00e1pidos. Por exemplo, enquanto o teste de uma amostra de produto em condi\u00e7\u00f5es de exposi\u00e7\u00e3o natural pode levar um ano para mostrar corros\u00e3o, resultados semelhantes podem ser obtidos em apenas 24 horas em condi\u00e7\u00f5es de n\u00e9voa salina artificial simulada.<\/p>\n<p>O ensaio de n\u00e9voa salina artificial simulada inclui o ensaio de n\u00e9voa salina neutra, o ensaio de n\u00e9voa salina de \u00e1cido ac\u00e9tico, o ensaio de n\u00e9voa salina de \u00e1cido ac\u00e9tico acelerado com cobre e o ensaio de n\u00e9voa salina alternada.<\/p>\n<p>(1) O ensaio de nevoeiro salino neutro (ensaio NSS) \u00e9 um m\u00e9todo de ensaio acelerado de corros\u00e3o desenvolvido precocemente e com amplas aplica\u00e7\u00f5es actuais. Utiliza uma solu\u00e7\u00e3o de \u00e1gua salgada de cloreto de s\u00f3dio 5% com um pH ajustado \u00e0 gama neutra (6-7) como solu\u00e7\u00e3o de pulveriza\u00e7\u00e3o. A temperatura de ensaio \u00e9 uniformemente fixada em 35\u00b0C, exigindo uma taxa de deposi\u00e7\u00e3o de n\u00e9voa salina entre 1-2 ml\/80 cm\u00b2-h.<\/p>\n<p>(2) O ensaio de proje\u00e7\u00e3o salina com \u00e1cido ac\u00e9tico (ensaio ASS) evoluiu a partir do ensaio de proje\u00e7\u00e3o salina neutra. Consiste em adicionar \u00e1cido ac\u00e9tico glacial a uma solu\u00e7\u00e3o de cloreto de s\u00f3dio 5%, baixando o pH para cerca de 3 e tornando a solu\u00e7\u00e3o \u00e1cida. Consequentemente, a n\u00e9voa salina resultante torna-se \u00e1cida em vez de neutra. A sua taxa de corros\u00e3o \u00e9 cerca de tr\u00eas vezes mais r\u00e1pida do que a do ensaio NSS.<\/p>\n<p>(3) O Copper-Accelerated Acetic Acid Salt Spray Test (ensaio CASS) \u00e9 um ensaio acelerado de corros\u00e3o por proje\u00e7\u00e3o salina recentemente desenvolvido no estrangeiro. Realizado a 50\u00b0C, incorpora uma pequena quantidade de cloreto de cobre na solu\u00e7\u00e3o salina para intensificar a indu\u00e7\u00e3o de corros\u00e3o. A sua taxa de corros\u00e3o \u00e9 aproximadamente oito vezes superior \u00e0 do ensaio NSS.<\/p>\n<p>Convers\u00e3o de dura\u00e7\u00f5es espec\u00edficas: 24 horas de ensaio de proje\u00e7\u00e3o salina neutra = 1 ano em ambiente natural 24 horas de ensaio de proje\u00e7\u00e3o salina de \u00e1cido ac\u00e9tico = 3 anos em ambiente natural 24 horas de ensaio de proje\u00e7\u00e3o salina de \u00e1cido ac\u00e9tico acelerado por cobre = 8 anos em ambiente natural<\/p>\n\t\t\n<style>\n#text-2206677146 {\n  font-size: 0.75rem;\n  line-height: 1.75;\n}\n@media (min-width:550px) {\n  #text-2206677146 {\n    font-size: 1.1rem;\n    line-height: 2;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n<div class=\"is-divider divider clearfix\" style=\"max-width:50px;\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":4349,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[84],"tags":[],"class_list":["post-4337","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Learn how 24-hour salt spray tests correlate to real-world years. 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