![a038-1-online.jpg](/assets/Images/B113_38_Designers_Get_Specific_With_Specs/a038-1-online__ClownCarImageQualityWzc1XQ_FillWzExMywxMTNd.jpg)
![product substitution](/assets/Uploads/product-substitution__ClownCarImageQualityWzc1XQ.jpg)
![This Issue](/_resources/themes/branzbuild/resources/img/badge-feature-section-121x121.png)
Feature section: Product substitution
Unauthorised product substitution is common in New Zealand due to non-specific documentation, unavailability of product or even personal preferences, but the designer should be responsible for any substitutions.
![corrosion](/assets/Uploads/corrosion__ClownCarImageQualityWzc1XQ.jpg)
![This Issue](/_resources/themes/branzbuild/resources/img/badge-feature-section-121x121.png)
Feature section: Corrosion
Corrosion can be defined as the destruction or deterioration of a material because of reaction with its environment. The term can refer to a process or the damage caused by the process.