In the course of ocean shipping or storage of containers, or return will often experience high temperature climate and strong day and night temperature change, the temperature change will be 0-8 degrees Celsius, and the humidity will reach 98%. This is the condensation phenomenon, when the temperature is 30 degrees At that time, the water content in the air was 30.4 g per square meter. When the temperature drops from 30 degrees Celsius to 18 degrees Celsius, water vapor will condense into water droplets. If it is a 40-foot container, 1,000 grams of condensate will be generated, which will cause "container rain".
The danger of container rain
Fungi, mold, and mildew will not cause damage to the goods when the relative humidity is below 55%. The occurrence and impact of corrosion depends on a number of variables, including humidity and time. Due to the variable factors, the effects can not be described at a fixed humidity, but in short, the lower the humidity, the better.
Factors to be considered while preventing container rain
1. Weather conditions during shipping;
2. Length of sea voyage;
3. Types of goods and commodities in the container and packaging materials;
4. Container status;
5, the sensitivity of the goods.