During the storage and maintenance of steel, the core goal is to prevent rust, avoid physical damage, and maintain stable performance. Targeted plans must be formulated based on the steel type, surface condition, and storage environment.
During the storage and maintenance of steel, the core goal is to prevent rust, avoid physical damage, and maintain stable performance. Targeted plans must be formulated based on the steel type, surface condition, and storage environment.
1. Storage Environment: Reduce Corrosion Risk at the SourceThe main causes of steel corrosion are moisture, oxygen, salt, and industrial pollutants. Therefore, environmental control is paramount.
Indoor storage is recommended for high-value/precision steel.Maintain relative humidity ≤ 60% in the warehouse. Ventilate the warehouse regularly 2-3 times daily for at least 30 minutes each time. Avoid drastic temperature fluctuations.
Ordinary steel is suitable for short-term outdoor storage.Select high-altitude, well-drained, hardened roads, away from saline-alkali land, chemical plants, and the seaside. Cover with waterproof canvas or colored cloth. When storing bare steel outdoors, apply a temporary application of short-term anti-rust oil.
2. Stacking Method: Avoid Physical Damage and Localized Water AccumulationDifferent types of steel require different stacking methods. The key is to ensure stability, ventilation, and the avoidance of water accumulation and crushing.
Plate: For example, when stacking Q345q bridge steel plates, the skids must be aligned to prevent overhanging edges (to prevent deformation). Mirror-finished stainless steel plates require a soft barrier film (such as PE film) between layers to prevent scratches.
Pipes: For example, when stacking stainless steel pipes, avoid direct contact with carbon steel (this can cause dissimilar metal corrosion). Galvanized steel or plastic sheets must be placed between layers to prevent damage.
Profiles: For example, when stacking TMT rebar, the steel should be classified by diameter (e.g., separate medium 16 and medium 20). Each bundle should be ≤1.5m tall, and the bottom skids should be ≥100mm above the ground to prevent moisture from rising from the ground.
3. Storage by Classification: Avoid mixing and corrosion, which can lead to misuse.Classify by material: Carbon steel (e.g., Q235), stainless steel (e.g., 304), alloy steel (e.g., Q420g), and titanium alloy plates should be stored separately, especially to avoid direct contact between carbon steel and stainless steel.
Classify by surface condition: Bare steel (uncoated), galvanized steel, painted steel, and brushed stainless steel should be stored separately.
Classify by use/specification: Items of the same material should be separated by specification or use, and clearly labeled to prevent misuse.
