公开(公告)号：US20040094236A1

公开(公告)日：2004-05-20

申请号：US10665597

申请日：2003-09-19

Applicant: Crown Technology, Inc.

Inventor： Tucker D. Maurer

IPC: C23C022/62

CPC classification number: C23C22/62 ,  C23C22/44

Abstract: Methods for passivating stainless steel after acid pickling treatment in the absence of nitric acid are provided. The methods include the steps of cleaning the pickled stainless steel with an alkaline composition to obtain clean steel, activating the clean steel with an activator composition to obtain activated steel, and passivating the activated steel with a passivating composition in the absence of nitric acid. In the preferred embodiment, the activator composition contains at least one activator, the activator having a significantly higher binding affinity for iron than for chromium as evidenced by their metal complex formation constants.

Abstract translation: 提供了在没有硝酸的酸洗处理后钝化不锈钢的方法。 所述方法包括用碱性组合物清洗腌制的不锈钢以获得清洁的钢，用活化剂组合物活化清洁钢以获得活化的钢，以及在不存在硝酸的情况下用钝化组合物钝化活化钢的步骤。 在优选的实施方案中，活化剂组合物含有至少一种活化剂，所述活化剂对于铁的结合亲和力比对铬的结合亲和力高，如其金属络合物形成常数所证明的。

公开(公告)号：US20030205298A1

公开(公告)日：2003-11-06

申请号：US10138603

申请日：2002-05-03

Inventor： William V. Block ,  Bryce D. Devine

IPC: C23C022/62

CPC classification number: C23C22/46 ,  C23C22/44 ,  C23C22/47 ,  C23C22/62 ,  C23C22/73

Abstract: This invention includes improvements to a method for forming a chemical conversion coating on ferrous metal substrates, to the chemical solutions used in the coating and to the articles coated thereby. A first oxidation applies a molecular iron/oxygen-enriched intermediate coating, such as a dicarboxylate or phosphate, to a ferrous substrate. A coloring procedure (a second oxidation) follows the first oxidation procedure, using a heated oxidizing solution that reacts with the iron and oxygen enriched intermediate coating to form magnetite (Fe3O4). The result is the formation of a brown or black finish. An appropriate rust preventive topcoat may seal the substrate. The finish affords protection, a degree of lubricity to aid assembly, break-in of sliding surfaces, provides anti-galling protection and an adherent base for paint finishes. Improvements to the first oxidation include a broader range of operating conditions, the addition of a hydroxylamine accelerator or a wetting agent, and operation by slurry deposition. Improvements to the second oxidation include a broader range of operating conditions, and the addition of a sequestrant or thio-based accelerator.

Abstract translation: 本发明包括改进用于在黑色金属基材上形成化学转化涂层的方法，以及用于涂层中的化学溶液以及由此涂覆的制品。 第一氧化将分子铁/富氧中间体涂层如二羧酸盐或磷酸盐应用于含铁底物。 使用与富含铁和富氧中间体涂层反应形成磁铁矿（Fe 3 O 4）的加热氧化溶液，进行第一次氧化处理后的着色程序（第二次氧化）。 结果是形成棕色或黑色的表面。 适当的防锈面漆可以密封基材。 整理提供保护，一定程度的润滑性，有助于组装，滑动表面的入侵，提供防磨损保护和涂漆底漆。 第一次氧化的改进包括较宽范围的操作条件，加入羟胺促进剂或润湿剂，以及通过浆料沉积操作。 对第二氧化的改进包括更宽范围的操作条件，以及加入螯合剂或硫基促进剂。

公开(公告)号：US20030155042A1

公开(公告)日：2003-08-21

申请号：US10319115

申请日：2002-12-13

Inventor： Richard Church

IPC: C23C022/62

CPC classification number: C23C22/08 ,  C23C22/10 ,  C23C22/12 ,  C23C22/13 ,  C23C22/18

Abstract: Alkyl-substituted hydroxylamines are useful as aids in the phosphating of metal substrates. In particular, the rate of phosphating and the rate at which manganese compounds are dissolved into aqueous phosphoric acid solutions may be accelerated by alkyl-substituted hydroxylamines.

Abstract translation: 烷基取代的羟胺可用作金属底物磷酸化的辅助剂。 特别地，磷酸化速率和锰化合物溶解在磷酸水溶液中的速率可以通过烷基取代的羟胺加速。