Mặc dù loại thép carbon sơn epoxy có hàm lượng kẽm cao, nhưng hiệu quả của cả hai đều không bằng thép mạ kẽm.

Do chi phí đầu tư cho một dự án silo cao, chi phí sơn toàn bộ bề mặt cao (nhân công, nguyên vật liệu, thời gian lắp đặt lâu hơn), khó sơn nhiều lớp, chất lượng cuối cùng thấp hơn và tuổi thọ của thép sơn thấp hơn, cho nên chúng tôi không khuyến nghị giải pháp này.

Sơn phủ chỉ nên được sử dụng như một hệ thống bảo dưỡng trong trường hợp xuất hiện vết gỉ.

B. WHY USE METAL SILOS INSTEAD OF WAREHOUSE STORAGE ?

Grain storage in silos is vertical, while the storage of grain in warehouses is horizontal.

Using steel silos to store the grain instead of using warehouses provides many advantages:

1. The first advantage lies in the occupied ground surface.  This method requires less ground space, which is important if space is not available or if its cost is high like at ports.
2. Another advantage lies in how easy it is to keep the optimum storage conditions for the grain, by controlling the temperature, insects, mould, birds, which in long term storage facilities could result in an important economic loss.
3. The third advantage consists of lower costs than that incurred from using warehouses, which entails the automation of the grain transport equipment. The loading as well as the unloading can be completely automated using a SCADA system and at a lower cost.
4. Handling the product stored in silos is simple, quick, less damaging to the grain and does not require investment in additional machinery for handling.
5. Another advantage is lower assembling costs since this element is designed specifically for this purpose and weighs less than a storage facility.
6. Finally, we have the fact that it is less expensive overall, and this is probably the main advantage in comparison to grain warehouses.