![](/assets/images/picto-drapeau-france-3a76576a5d60a512053b4612ab58dae5.png)
5. Operating problems
5.1 Sheet metal corrosion
A series of incidents occurred on the first high-temperature cowpers shortly after commissioning: the sheet metal cracked. It took several years to confirm that these disorders were due to stress corrosion initiated in the weld seam areas by the presence of alkali nitrates. Heating the air to high temperature leads to the synthesis of NO x , which combine with water and condense on the wall, forming alkali nitrates with the insulation.
Figure 3 shows the NO x levels recorded as a function of temperature. Several palliatives have been proposed. For the cowpers to be built,...
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
![](/assets/images/logo-eti-286623ed91fa802ce039246e516e5852.png)
The Ultimate Scientific and Technical Reference
This article is included in
Metal manufacturing processes and recycling
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Operating problems