Iron corrosion; anti-fouling and anti-corrosive paints . rmanent lodgment forthe water, and facilitate its penetration into the layer of paint. Applying the case of iron, as in painting on other surfaces, it isalso necessary to lay the jjaint on as thinly as possible consistentwith covering the object, and on no account should the coating he sothick as to form a wrinkled instead of a smooth surface on the paint be too thick or too thickly laid on—and very thin IRON-CORROSION AND ANTI-COEROSIVE PAINTS. 93 paint is liable to run off altogether when applied to verticalsurfaces—
Iron corrosion; anti-fouling and anti-corrosive paints . rmanent lodgment forthe water, and facilitate its penetration into the layer of paint. Applying the case of iron, as in painting on other surfaces, it isalso necessary to lay the jjaint on as thinly as possible consistentwith covering the object, and on no account should the coating he sothick as to form a wrinkled instead of a smooth surface on the paint be too thick or too thickly laid on—and very thin IRON-CORROSION AND ANTI-COEROSIVE PAINTS. 93 paint is liable to run off altogether when applied to verticalsurfaces—it will spread evenly, in accordance with its naturaltendency, but does not dry in a normal manner. The upperlayer skins over before the underneath parts have begun todry, and when drying does ensue there, the skin contractsand forms wrinkles and folds, which spoil the smoothness ofthe surface and present an opportunity for the retention ofrain water and condensed moisture. In the end thesewrinkles and folds easily split, thus enabling the water to. Pig. 46 (magnified).—Efiect of fine spray (rain) on a wet coat of paint. gain admission to the inferior strata of the paint, wherebythe durability of the coating is imperilled. The number of coats of paint required to protect thesubstratum depends on the covering power of the power implies the quantity of paint necessary, per givenunit of surface, to completely mask the colour and superficialcharacteristics (not form) of the underlying material. Now the various pigments diiifer considerably in coveringpower; but the matter must be regarded from two stand-points, and it is preferable to speak of absolute and relative 94 mON-COEEOSION AND ANTI-COHROSIVE PAINTS. covering power. White lead, to take one example, possessesa greater absolute covering povper than zinc white, but therelative covering power of the latter exceeds that of the
Size: 1581px × 1581px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectcorrosionandanticorr
