Water vapor adsorption Corrosion Inhibitor
Moisture-adsorption inhibitors are chemical additives in electrode coatings that absorb moisture, preventing electrodes from rusting or getting damaged.
Physical-Chemical Mechanism of Action
Moisture adsorbents are adsorption agents that take up water molecules on their surface. These inhibitors react with water vapor in the air and bind it tightly to reduce humidity.
Metallurgical Relevance & Welding Risks
Without moisture adsorbents, electrodes can get damp and rust during storage or handling. Rusty electrodes lead to poor electrical conductivity, which impairs welding processes. In addition, moisture can cause corrosion in the weld pool, which can affect the quality of the weld.
Workshop Practice & Action Guidelines
Use electrode containers with moisture adsorbents when electrodes are stored or transported for extended periods. Make sure the containers are closed and the adsorbent is active. If needed, moisture can be removed by briefly heating the electrode.