| 摘要 |
<p>Steel surfaces and ballast tanks, cargo holds, cofferdams, bridge undersides, the interior of offshore legs, ship hulls, ship cabin walls, ship decks, aircraft landing areas on ships or offshore constructions, drinking water tanks, underseals for containers, etc., are painted or coated by applying a composite material, which on curing, forms a material comprising a matrix comprising; A) homogeneously arranged inorganic solid particles of a size of from about 50 66 to about 0.5 //c, or a coherent structure formed from such homogeneously arranged particles; and B) densely packed solid particles having a size of the order of 0.5 - 100 //c and being at least one order of magnitude larger than the respective particles stated under A), or a coherent structure formed from such densely packed particles, the particles (A) or the coherent structure formed therefrom being homogeneously distributed in the void volume between the particles (B), the dense packing being substantially a packing corresponding to the one obtainable by gentle mechanical influence on a system of geometrically equally shaped large particles in which locking surface forces do not have any significant effect; and allowing the paint or surface coating composition to cure to form the above-defined matrix. Particles (B) are preferably Portland cement, particles (A) are preferably silica dust generated by growth from a vapour phase such as silica dust produced as a by product in the production of ferrosilicium or silicium metal in electrical furnaces. Homogeneous distribution of particles (A) is obtained by means of a surface active dispersing agent such as a concrete superplasticizer. Paint for use in the above method and generally for painting or coating any marine, offshore or landstructure to be coated and/or protected comprises above constituents and an organic binder such as a water-based emulsion, and optionally a defoamer and/or a thixotropic agent.</p> |
