{"id":5531,"date":"2023-07-04T19:01:52","date_gmt":"2023-07-04T11:01:52","guid":{"rendered":"https:\/\/www.dcl-controls.com\/?p=5531"},"modified":"2025-03-31T08:59:59","modified_gmt":"2025-03-31T08:59:59","slug":"humidity-reduce-usage-life","status":"publish","type":"post","link":"https:\/\/dclcontrols.com\/zh_hk\/%e6%94%af%e6%8f%b4\/ta-acutator\/humidity-reduce-usage-life","title":{"rendered":"\u6fd5\u5ea6\u5982\u4f55\u964d\u4f4e\u81f4\u52d5\u5668\uff08\u96fb\u52d5\u95a5\u9580\uff09\u7684\u58fd\u547d\uff1f"},"content":{"rendered":"
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Humidity is well known to cause damage to electronic components. One of the primary ways humidity reduces the lifespan of electric actuators is through ionic migration short circuits<\/strong>.<\/p>

1. What is Ionic Migration Short Circuit?<\/strong><\/h2>

<\/p>

Ionic migration occurs when moisture and contaminants<\/strong> on a circuit board facilitate the movement of ions between conductors, leading to short circuits. The process follows these steps:<\/p>

1\ufe0f\u20e3 Presence of an electric field<\/strong> between two conductors on an insulator.
2\ufe0f\u20e3 Electrolytic reaction<\/strong> occurs at the anode, releasing metal ions.
3\ufe0f\u20e3 Ions migrate<\/strong> under the influence of the electric field toward the cathode.
4\ufe0f\u20e3 Once enough ions accumulate at the cathode, a conductive bridge forms<\/strong>, causing a short circuit.<\/p>

This leads to the failure of the actuator’s PCBA (Printed Circuit Board Assembly)<\/strong>.<\/p>

2. Common Causes of Ionic Migration on PCBA<\/strong><\/h2>

Ionic migration short circuits typically occur in the following conditions:<\/p>

\u2714 Impurities and moisture on PCB substrate<\/strong>
\u2714 Residual electrolytes<\/strong> from plating processes left in PCB holes
\u2714 Flux, adhesives, or other electrolytic materials<\/strong> used during PCBA manufacturing
\u2714 Dust, ionic contamination, and condensation<\/strong> accumulated on the PCBA over time<\/p>

3. Preventive Measures Against Ionic Migration<\/strong><\/h2>

To extend the lifespan of electric actuators and prevent failures due to humidity<\/strong>, the following measures are recommended:<\/p>

\u2705 Apply Conformal Coating (Three-Proofing Paint)<\/strong><\/h3>

<\/p>

  • Coating the PCBA with a conformal coating protects it from dust, moisture, and contaminants<\/strong>.<\/p><\/li>

  • This is one of the most effective<\/strong> measures to prevent ionic migration.<\/p><\/li><\/ul>

    \u2705 Fully Encapsulate the PCBA<\/strong><\/h3>

    <\/p>

    • In high-humidity or applications with large temperature fluctuations<\/strong>, fully encapsulating<\/strong> the circuit board provides the highest level of protection.<\/p><\/li><\/ul>

      \u2705 Use a Dehumidifying Heater (PTC Heater)<\/strong><\/h3>

      <\/p>

      • Installing a PTC dehumidifying heater<\/strong> helps reduce humidity inside the sealed enclosure.<\/p><\/li>

      • However, in IP67+ fully sealed enclosures<\/strong>, dehumidifying heaters may not immediately reduce air humidity<\/strong> at the initial heating stage.<\/p><\/li>

      • Therefore, in certain situations, it may not completely prevent ionic migration short circuits<\/strong>.<\/p><\/li><\/ul>

        By implementing these protective measures<\/strong>, the reliability and lifespan of electric actuators can be greatly improved<\/strong>, ensuring stable performance in humid environments<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

        \u773e\u6240\u5468\u77e5\uff0c\u6fd5\u5ea6\u6703\u5c0d\u96fb\u5b50\u5143\u4ef6\u9020\u6210\u50b7\u5bb3\u3002\u6fd5\u5ea6\u7e2e\u77ed\u96fb\u52d5\u81f4\u52d5\u5668\u58fd\u547d\u7684\u4e3b\u8981\u539f\u56e0\u4e4b\u4e00\u662f\u96e2\u5b50\u9077\u79fb\u77ed\u8def\u3002 1. \u4ec0\u9ebc\u662f\u96e2\u5b50\u9077\u79fb\u77ed\u8def\uff1f\u7576\u96fb\u8def\u677f\u4e0a\u7684\u6c34\u5206\u548c\u6c61\u67d3\u7269\u4fc3\u9032\u5c0e\u9ad4\u9593\u96e2\u5b50\u7684\u79fb\u52d5\u6642\uff0c\u5c31\u6703\u767c\u751f\u96e2\u5b50\u9077\u79fb\uff0c\u5c0e\u81f4\u2026<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_theme","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[8],"tags":[53,66,39,57,52,65],"class_list":["post-5531","post","type-post","status-publish","format-standard","hentry","category-ta-acutator","tag-actuator","tag-explosion-proof-actuator","tag-faq","tag-general-actuator","tag-fast-move-actuator","tag-very-small-actuator-tag"],"acf":[],"_links":{"self":[{"href":"https:\/\/dclcontrols.com\/zh_hk\/wp-json\/wp\/v2\/posts\/5531","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dclcontrols.com\/zh_hk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dclcontrols.com\/zh_hk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dclcontrols.com\/zh_hk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dclcontrols.com\/zh_hk\/wp-json\/wp\/v2\/comments?post=5531"}],"version-history":[{"count":0,"href":"https:\/\/dclcontrols.com\/zh_hk\/wp-json\/wp\/v2\/posts\/5531\/revisions"}],"wp:attachment":[{"href":"https:\/\/dclcontrols.com\/zh_hk\/wp-json\/wp\/v2\/media?parent=5531"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dclcontrols.com\/zh_hk\/wp-json\/wp\/v2\/categories?post=5531"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dclcontrols.com\/zh_hk\/wp-json\/wp\/v2\/tags?post=5531"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}