Oxide Cleanliness
Oxide cleanliness refers to the amount of oxidized material in a metal or weld. High cleanliness means less oxygen reacts with the metal and fewer pores form.
Physical-Chemical Mechanism of Action
Oxide purity refers to the reduction of oxidized material in a metal. This happens through chemical reactions with oxygen or slags that can form during the welding process.
Metallurgical Relevance & Welding Risks
Low oxide purity leads to an increased number of pores in the weld. These pores can impair mechanical properties and cause cracks. Additionally, high oxidation can damage the metal's structure, lowering its strength and toughness.
Workshop Practice & Action Items
To increase oxide purity, take the following measures:
• Use clean base materials and fluxes.
• Keep the weld pool dry and protect it from oxygen.
• Control the cooling temperature and time to ensure uniform solidification.