Powder Reactivity Analysis
Powder reactivity analysis examines metal powders for their tendency to oxidize and absorb moisture. This is important for storage and processing to avoid corrosion and quality issues.
Physical-chemical mechanism of action
Powder reactivity analysis involves measuring the oxidation rate and moisture pickup of metal powders. This is done in a closed system under controlled conditions to observe chemical reactions.
Metallurgical relevance & welding risks
High oxidation tendency or strong moisture pickup can lead to powder corrosion. This can cause quality problems, like uneven weld seams or reduced mechanical properties. Besides that, corrosion can hurt the service life and reliability of the final part.
Workshop practice & instructions
For a correct powder reactivity analysis, do the following steps:
1. Powder selection: Pick powder with low oxidation tendency and low moisture pickup.
2. Storage: Store powders in a dry, cool place and protect them from air and moisture.
3. Processing: Process the powder as quickly as possible to keep oxidation time to a minimum.
4. Quality control: Check powder quality for oxidation and moisture pickup on a regular basis.