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油漆涂层不能确保在侵蚀性大气中的钢结构的防腐。本文对耐大气侵蚀性较强的低合金钢、用电弧法镀敷的铝层和热镀锌法等的经济优越性和应用前景作了评价。 为了进一步改进防腐措施,必须有区别地选择防腐材料和防腐方法,并且要考虑:(1)正确地确定腐蚀负荷和生产负荷的综合情况;(2)对结构所有零部件保护的恢复期限和各种条件;(3)在全部使用期间的最终总支出。研究了实现这些原则和完成有待解决的一些课题的具体途径。 钢结构的生产是这样的一个领域,即应用现有的全部防腐材料和方法正确地和有区别地解决和选择防腐措施能够显著地降低损耗。但是,改进钢结构免受大气腐蚀的方法的重要性至少由三种情况决定的:运行中的结构体积大;必须保证其长期使用寿命;用于恢复不耐用的油漆涂层的开支大。 可以从捷克斯洛伐克的经验中援引一些数据作为例子。1975年底钢结构表面约为14000万米~2,重量为6100吨。1977年生产了34万吨钢结构。这些新结构的大部分都是用油漆涂层进行保护的。目前约有12％的结构用镀铝法防腐,12％的结构用热锌法防腐,还有不到2％的结构用耐大气腐蚀性强的低合金钢制造。由于在捷克斯洛伐克运行中的钢结构,有50％以上受侵蚀级为4和5级的大气作用,所以目前用油漆涂层防腐的方法是没有经济效果的,因?
Paint coatings do not ensure corrosion protection of steel structures in aggressive atmospheres. In this paper, we evaluate the economic advantages and application prospects of the low alloy steel which is resistant to atmospheric erosion, the aluminum coating by the arc method and the hot-dip galvanizing method. In order to further improve the anticorrosive measures, anticorrosive materials and anticorrosive methods must be differentially selected. Consideration should also be given to: (1) Corroboration of the comprehensive situation of corrosion load and production load; (2) Restoration period and protection of all components of the structure Conditions; (3) Final total expenditure over all periods of use. Studied the concrete ways to realize these principles and accomplish some topics to be solved. The production of steel structures is an area where the correct and differentiated solution and selection of anti-corrosion measures using all existing anti-corrosion materials and methods can significantly reduce losses. However, the importance of a method of improving the corrosion resistance of steel structures is at least three-fold: large structures in operation; long service life to be assured; and large expenditures for the restoration of non-durable paint coatings. Citing some of the data from Czechoslovakia’s experience as an example. At the end of 1975, the surface of the steel structure was about 140 million m 2 and the weight was 6,100 tons. 1977 produced 340,000 tons of steel structure. Most of these new structures are protected with paint coatings. At present, about 12% of the structures are preserved with aluminum plating, 12% with hot zinc, and less than 2% with low alloyed steel that is resistant to atmospheric corrosivity. Since over 50% of the steel structures operating in Czechoslovakia are exposed to the atmosphere at levels 4 and 5, the current method of preserving paint coatings is not economically advantageous, since?