Method of applying zinc-rich primer and product
应用富锌底漆和产品的方法
United States Patent 4346143
美国专利4346143
Zinc chromate
铬酸锌
紫盖Production of zinc chromate and zinc tetraoxy chromates
铬酸锌和锌tetraoxy铬酸盐的生产
高级职称论文
An improved process for providing corrosion protection to ferrous metal substrates is disclod. The improved process involves a first treating of the surface of the ferrous metal substrate with nitric acid followed by directly applying to the previously treated surface a zin
什么样的云朵c-rich coating composition. Upon curing the zinc-rich coating composition, an adherent electroconductive coating is formed. The coating provides excellent corrosion protection and since it is electroconductive, the coating is weldable and can accept a subquent electrocoat.
傅希来含铁金属底层防腐的改进方法已被揭晓。改进方法包括先用硝酸对含铁金属底层表面进行处理，然后直接对之前处理过的表面使用富锌涂层合成物。接着固化富锌涂层合成物，一个粘合的导电涂层就形成了。由于涂层是导电的，它提供了很好的防腐能力，它是可电焊的，可以在之后进行电焊涂层。
DETAILED DESCRIPTION
细节描述
As mentioned above, the prent invention is concerned with an improved method for providing corrosion resistance to a metal surface.
如上所述，现在的发明主要是关于金属表面防腐的改进方法。
The metal substrate which is treated in accordance with the prent invention is a ferrous metal substrate such as iron, cold rolled steel, hot rolled steel and pickled steel. The ferrous metal substrate can come in a variety of shapes such as sheet, plates, bars and rods. Usually, the ferrous metal treated in accordance with the method of the prent invention is coil metal which comes in the form of a continuous strip wound on a spool. The coil metal is of a relatively thin gauge, that is, about 10 to 100 mils, and its width varies depending upon its intended u. The system should be capable of coating metal having widths of 1/2 to 72 inches and should be adaptable for both narrower and wider widths. Usually with coil metal, the method of the invention is practiced in a continuous manner with the coil being unwound from the spool and pasd through various stations where it is cleaned, nitric acid pretreated, further treated, primer coated, cured and optionally topcoated and cured before it is formed into its desired shape.
使用现在发明所处理的金属底层是含铁金属底层比如铁、冷轧钢材、热轧钢材和酸浸钢材。含铁金属底层可以变成很多形状，比如薄片、平板、条状和棒条状。使用现在发明处理的含铁金属通常是一卷连续缠绕在线轴上的线圈状金属。线圈金属属于相对薄的规格，
大约 10到100mils，宽度根据使用情况而定。这个系统可适用于宽度1/2到72英尺的金属涂料。通常对于线圈状的金属，这个发明的使用方法是持续地将线圈从线轴松开，在成形前通过清洗、硝酸预处理、深度加工、涂覆底漆、固化、涂覆面漆、固化几个步骤。
Before treating the ferrous metal surface, it is preferred to remove foreign matter from the metal surface by thoroughly cleaning and degreasing. Degreasing may be accomplished with known agents, for example, with agents containing sodium metasilicate, caustic soda, carbon tetrachloride, trichloroethylene and the like. The u of a commercial alkaline cleaning composition which combines washing and mild abrasion treatments can be employed for cleaning, for example, an aqueous trisodium phosphate-sodium hydroxide cleaning solution.
在处理含铁金属表面前，最好先通过清洗和去油将金属表面的杂志去除。去油需要由知名的代理完成，步骤包括硅酸钠、氢氧化钠、四氯化碳、三氯乙烯等。可以使用商业碱洗合成物通过洗涤、轻度摩擦处理来清洗，比如水状磷酸三钠-氢氧化钠清洗溶液。
The nitric acid treating operation can be accomplished by contacting the ferrous metal wit
h an aqueous nitric acid solution such as by immersing the ferrous metal substrate in a nitric acid bath. Besides immersion in a tank or vat of nitric acid, the nitric acid treatment can be accomplished by flooding the acid upon the metal surface, applying the nitric acid by spraying, by direct roll coating or by rever roll coating. Spraying is less preferred becau of nitrogen oxide fumes. 小型犬有哪些品种
硝酸处理是通过金属材料与硝酸液体溶液的接触完成的，比如将金属材料底层浸泡在硝酸液体缸中。除了浸泡在硝酸槽或者桶中，硝酸处理还可以通过在金属表面冲洗酸液、喷硝酸溶液、直接滚动涂层或反向滚动涂层。由于氧化氮废气，喷涂的方法比较不建议采纳。
The concentration of the nitric acid will vary depending on metal quality and the contact time of the nitric acid with the ferrous metal. The concentration should be less than 20 percent and preferably from about 1 to 15 percent by weight nitric acid, with the remainder of the bath being principally water. Surfactants, defoaming agents, thickeners, deodorants and other additives can optionally be prent in the nitric acid treating composition, although their concentration in total will generally not amount to more than 1
0 percent by weight treating composition. Concentrations of nitric acid greater than 20 percent by weight are not recommended becau of handling hazards and becau of adver effects on corrosion protection. Concentrations of nitric acid less than one percent by weight are not recommended for coil line applications becau of insufficient adhesion and corrosion protection. However, for other applications, lower concentrations at correspondingly higher dwell times could be ud.
狐貉
硝酸的浓度取决于金属的特性和硝酸与含铁金属接触的时间。浓度应该小于百分之二十，最好硝酸的重量在百分之一到百分之十五之间，液体槽中剩下的应该主要是水。可以有选择地在硝酸处理合成物中加入表面活性剂、消泡剂、增稠剂、除臭剂和其他添加剂，但是他们的浓度占总体处理合成物重量不超过百分之十。硝酸浓聚物的重量不应超过百分之二十，因为它会导致处理危险和对防腐的副作用。对于线圈的应用，硝酸聚合物的浓度不应低于百分之一，因为那样会导致附着和防腐效果不足。但是对于其他应用，应该采用低浓度和相对长时间的反应时间。
周璇The contact time or time the ferrous metal is in contact with the nitric acid should be for at
least one cond and preferably for about 5 to 60 conds. Contact times significantly less than one cond are not recommended becau of insufficient adhesion and corrosion protection. Contact times of much greater than 60 conds are not recommended for coil line applications becau of undesirable deposits on the metal and becau of poor adhesion. The contact time will also depend on the concentration of the nitric acid. In general, at higher nitric acid concentrations, less contact time is required and at lower nitric acid concentrations, a greater contact time is required. 单板滑雪教程
