Common Structural Rules - Common Structural Rules for Bulk Carriers and Oil Tankers, January 2019 - Part 2 Ship Types - Chapter 1 Bulk Carriers - Section 2 Structural Design Principles - 2 Corrosion Protection
2 Corrosion Protection
2.1 General
2.1.1 Void double side skin spaces
Void double side skin spaces are to have a corrosion protective system fitted in accordance with [2.2].
2.1.2 Cargo holds and ballast holds
Cargo holds and ballast holds are to have a corrosion protective system fitted in accordance with [2.3].
2.2 Protection of void double side skin spaces
2.2.1 Void double side skin spaces in the cargo area for ships having a freeboard length LLL of not less than 150 m are to have an efficient corrosion prevention system, such as hard protective coatings or equivalent.
2.3 Protection of cargo hold spaces
2.3.1 Coating
It is the responsibility of the builder and of the owner to choose coatings suitable for the intended cargoes, in particular for the compatibility with the cargo.
2.3.2 Application
All internal and external surfaces of hatch coamings and hatch covers, and all internal surfaces of cargo holds (side and transverse bulkheads), excluding the inner bottom area and part of the hopper tank sloping plate and lower stool sloping plate, are to have an efficient protective coating, of an epoxy type or equivalent, applied in accordance with the manufacturer’s recommendation.
The side and transverse bulkhead areas to be coated are specified in [2.3.3] and [2.3.4] respectively.
2.3.3 Side areas to be coated
The areas to be coated are the internal surfaces of:
- The inner side plating.
- The internal surfaces of the topside tank sloping plates.
- The internal surfaces of the hopper tank sloping plates for a distance of 300 mm below the frame end bracket for holds of single side skin construction, or below the hopper tank upper end for holds of double side skin construction.
These areas are shown in Figure 1.
Figure 1 : Side areas to be coated
2.3.4 Transverse bulkhead areas to be coated
The areas of transverse bulkheads to be coated are all the areas located above an horizontal level located at a distance of 300 mm below the frame end bracket for holds of single side skin construction or below the hopper tank upper end for holds of double side skin construction.
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