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→13.5.4 Corrosion Testing
Battelle (the Battelle Institute) has, for different applications, defined four climate classes which reflect the corrosion behavior of porous electroplated gold surfaces. Such gold layers are often used in connectors for the telecommunications and information technology ''(Table 13.5, Fig. 13.14)''.
<figtable id="tab:Classification of Corrosion Effects According to Battelle">'''Table 13.5: Classification of Corrosion Effects According to Battelle''' {| class="twocolortable" style="text-align: left; font-size: 12px"|-!Class!Application!Corrosion Effects!H<sub>2</sub>S [ppb]!CI<sub>2</sub>!NO<sub>2</sub> [ppb]!Temporature [°C]!Relative Humidity [%]|-|'''Ⅰ'''|Controlled office climate|None||||||}</figtable>
The dominant corrosion effects for thin gold coatings are pore corrosion and at higher gas concentrations creep corrosion from the base materials onto the coating starting at the boundary line between non-precious base metal and contact layer.
