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<p>This part of ISO 4524 provides procedures for conducting mixed flowing gas (MFG) environmental tests involving</p>
<p>exposures to controlled quantities of corrosive gas mixtures.</p>
<p>It describes the required equipment and the methods for gas, temperature and humidity control that enable tests to</p>
<p>be conducted in a reproducible manner. Reproducibility is measured through the use of control coupons the</p>
<p>corrosion films of which are evaluated by mass gain, coulometry or by various electron and X-ray beam analysis</p>
<p>techniques. Reproducibility can also be measured by in situ corrosion rate monitors using electrical resistance or</p>
<p>mass frequency change methods.</p>
<p>MFG tests can be used to:</p>
<p>_ evaluate novel electrical contact metallization for susceptibility to degradation due to environmental exposure</p>
<p>to the test corrosive gases;</p>
<p>_ evaluate the shielding capability of connector housings that may act as a barrier to the ingress of corrosive</p>
<p>gases;</p>
<p>_ evaluate the susceptibility of other connector materials such as plastic housings to degradation from the test</p>
<p>corrosive gases.</p>
<p>MFG tests are not normally:</p>
<p>_ used as porosity tests (for guidance on porosity testing, see ISO 10308, Metallic coatings — review of porosity</p>
<p>tests);</p>
<p>_ applicable where the failure mechanism is other than pollutant gas corrosion such as in tin-coated separable</p>
<p>contacts.</p>
Reģistrācijas numurs (WIID)
10428
Darbības sfēra
<p>This part of ISO 4524 provides procedures for conducting mixed flowing gas (MFG) environmental tests involving</p>
<p>exposures to controlled quantities of corrosive gas mixtures.</p>
<p>It describes the required equipment and the methods for gas, temperature and humidity control that enable tests to</p>
<p>be conducted in a reproducible manner. Reproducibility is measured through the use of control coupons the</p>
<p>corrosion films of which are evaluated by mass gain, coulometry or by various electron and X-ray beam analysis</p>
<p>techniques. Reproducibility can also be measured by in situ corrosion rate monitors using electrical resistance or</p>
<p>mass frequency change methods.</p>
<p>MFG tests can be used to:</p>
<p>_ evaluate novel electrical contact metallization for susceptibility to degradation due to environmental exposure</p>
<p>to the test corrosive gases;</p>
<p>_ evaluate the shielding capability of connector housings that may act as a barrier to the ingress of corrosive</p>
<p>gases;</p>
<p>_ evaluate the susceptibility of other connector materials such as plastic housings to degradation from the test</p>
<p>corrosive gases.</p>
<p>MFG tests are not normally:</p>
<p>_ used as porosity tests (for guidance on porosity testing, see ISO 10308, Metallic coatings — review of porosity</p>
<p>tests);</p>
<p>_ applicable where the failure mechanism is other than pollutant gas corrosion such as in tin-coated separable</p>
<p>contacts.</p>
