First, PPGI corrugated roofing sheet for sale is widely used, and has no pollution, excellent weather resistance, corrosion resistance, and high processing and other characteristics, PPGI corrugated roofing sheet is generally widely used in industrial aspects, in the construction, household appliances, packaging, mechanical processing, transportation, interior decoration, medical and automotive and other industrial aspects are involved. Second, PPGI corrugated roofing sheet purposes in the home appliances is 31%, while in the purpose of the construction accounted for 63%, is indispensable for the construction industry, in other aspects of the application is less, about 6%, with the zinc plating steel plate as the base plate width, have protection and isolation effect, not only can prevent the steel rust, prolong service life of more than 50% than before, and the stronger protective effect. Three, region, and use the different parts, even with the same amount of galvanized, paint and coating thickness of the same width, and its service life is also more different, in the industrial area and coastal area, due to the role of sulphur dioxide gas in the air or salt, corrosion velocity can accelerate that lead to the service life of the affected, and in the rainy season, the coating is soaked by the rain for a long time will quickly from corrosion and thus reduce the service life. Four, PPGI corrugated roofing sheet manufacturing buildings and factories, if often rain wash even prolong service life, or more vulnerable to sulfur dioxide, salt and dust effect is used, so in the design, the slope of the roof, the accumulation of dust and other contaminants, the less the longer service life will be, for those who are not affected by rain often wash the location and area should be clean regularly.