公开(公告)号：US4169022A

公开(公告)日：1979-09-25

申请号：US908236

申请日：1978-05-22

申请人： John J. B. Ward ,  Clive Barnes

发明人： John J. B. Ward ,  Clive Barnes

IPC分类号： C25D3/06 ,  C25D11/38 ,  C25D11/00

CPC分类号： C25D3/06 ,  C25D11/38 ,  C25D9/08

摘要： A method of depositing a protective chromite conversion coating is described. The chromite coatings produced by the method contain no Cr.sup.VI. The electrolyte used in the method comprises Cr.sup.III ions in a concentration of not more than 1 molar and a weak complexing agent for Cr.sup.III ions. The electrolyte, preferably, also contains conductivity salts. The method involves using a cathode current density of not more than 2000 amps per square meter and a temperature of not more than 35.degree. C. for a period of not more than 3 minutes. The chromite conversion coatings can be improved by aging and can be subsequently painted or lacquered. The Cr.sup.III electrolytes used are much less corrosive than Cr.sup.VI electrolytes and thus the substrates which can be coated include materials which cannot readily be chromate coated because they are reactive towards Cr.sup.VI electrolytes.

摘要翻译： 描述了一种沉积保护性铬铁矿转化涂层的方法。 通过该方法生产的铬铁矿涂层不含CrVI。 该方法中使用的电解质包含浓度不超过1摩尔的CrIII离子和CrIII离子的弱络合剂。 电解质优选还含有导电盐。 该方法包括使用不超过2000安培/平方米的阴极电流密度和不超过35℃的温度不超过3分钟的时间。 铬酸盐转化涂层可以通过老化改善，并可以随后进行涂漆或涂漆。 所使用的CrIII电解质比CrVI电解质腐蚀性低得多，因此可以涂覆的基材包括不能容易地镀铬的材料，因为它们对CrVI电解质具有反应性。

公开(公告)号：US4159230A

公开(公告)日：1979-06-26

申请号：US882442

申请日：1978-03-01

申请人： Clive Barnes ,  John J. B. Ward

发明人： Clive Barnes ,  John J. B. Ward

IPC分类号： C25D5/10 ,  C23C22/68 ,  C25D5/24 ,  C25D5/48

CPC分类号： C23C22/68 ,  C25D5/48 ,  Y10T428/12479 ,  Y10T428/12535 ,  Y10T428/12792 ,  Y10T428/12847

摘要： A method whereby a surface of chromium metal electrodeposited on a zinc substrate from a trivalent chromium electrolyte is treated by contacting the surface with an aqueous solution at a pH of from 5 to 12 and containing a dissolved metal salt of a weak acid which does not form a soluble complex with zinc. Preferred salts are carbonates, phosphates and silicates of an alkali metal, e.g. sodium or potassium. Also disclosed is the product of said process comprising an article having a zinc substrate, a microporous electrodeposited chromium coating from 0.025 to 2.5 microns in thickness on said substrate, and a water-insoluble basic salt of zinc within the micropores.

摘要翻译： 通过使表面与pH为5〜12的水溶液接触，并且含有不形成的弱酸的溶解金属盐，来处理从三价铬电解质电沉积在锌基材上的铬金属的表面的方法 与锌的可溶性复合物。 优选的盐是碱金属的碳酸盐，磷酸盐和硅酸盐，例如。 钠或钾。 还公开了所述方法的产物，其包括具有锌基底的物品，在所述基底上厚度为0.025至2.5微米的微孔电沉积铬涂层，以及微孔内的不溶于水的不溶性锌盐。

公开(公告)号：US4137132A

公开(公告)日：1979-01-30

申请号：US802193

申请日：1977-05-31

申请人： John J. B. Ward ,  Clive Barnes

发明人： John J. B. Ward ,  Clive Barnes

IPC分类号： C25D11/38

CPC分类号： C25D9/08 ,  C25D11/38

摘要： A method of producing chromium conversion coatings is described. The coatings are novel in that they are chromite i.e. Cr.sub.2 O.sub.3 coatings rather than the conventional chromate i.e. CrO.sub.3 coatings. The invention includes a novel electrolyte for depositing chromite layers. The electrolyte is an aqueous solution containing Cr.sup.III ions, a weak complexing agent for Cr.sup.III ions and a poison for the electrodeposition of chromium metal. The electrolyte preferably also contains conductivity salts and may include other additives such as fluoride ion and boric acid. Examples of poisons are Cr.sup.VI ions, peroxide, nitrate, polyamines, phosphates and formaldehyde. The chromite conversion coatings can be improved by aging and can be subsequently painted or lacquered. The electrolytes of the present invention are much less corrosive than Cr.sup.VI electrolytes and thus the substrates which can be coated include materials which cannot readily be chromate coated because they are reactive towards Cr.sup.VI electrolytes.

摘要翻译： 描述了生产铬转化涂层的方法。 涂层是新颖的，因为它们是铬铁矿，即Cr 2 O 3涂层，而不是常规的铬酸盐，即CrO 3涂层。 本发明包括用于沉积铬铁矿层的新型电解质。 电解质是含有CrIIIions的水溶液，CrIIIion的弱络合剂和用于电镀铬金属的毒物。 电解质优选还含有导电盐，并且可以包括其它添加剂，例如氟离子和硼酸。 毒药的例子有CrVIions，过氧化物，硝酸盐，多胺，磷酸盐和甲醛。 铬酸盐转化涂层可以通过老化改善，并可以随后进行涂漆或涂漆。 本发明的电解质比CrVI电解质腐蚀性低得多，因此可以被涂覆的基材包括不能容易地镀铬的材料，因为它们对CrVI电解质具有反应性。

公开(公告)号：US4157945A

公开(公告)日：1979-06-12

申请号：US864515

申请日：1977-12-27

申请人： John J. B. Ward ,  Clive Barnes

发明人： John J. B. Ward ,  Clive Barnes

IPC分类号： C25D3/06

CPC分类号： C25D3/06

摘要： An electrolyte bath and a method for using such a bath comprising trivalent chromium ions dissolved in an aqueous solution containing sulphide. The bath may also contain a weak complexing agent such as hypophosphite or glycine. The electrolyte according to the invention permits the electrodeposition of chormium from electrolytes having low solids content without adversely affecting plating rates.

摘要翻译： 电解质浴和使用这种包含溶解在含有硫化物的水溶液中的三价铬离子的浴的方法。 该浴还可含有弱络合剂如次磷酸盐或甘氨酸。 根据本发明的电解质允许来自具有低固体含量的电解质的铈的电沉积，而不会不利地影响电镀速率。

公开(公告)号：US4196063A

公开(公告)日：1980-04-01

申请号：US31748

申请日：1979-04-19

申请人： Clive Barnes ,  John J. B. Ward

发明人： Clive Barnes ,  John J. B. Ward

IPC分类号： C25D7/00 ,  C25D3/06 ,  C25D3/08 ,  F24J2/48 ,  C25D3/56

CPC分类号： F24J2/487 ,  C25D3/06 ,  C25D3/08 ,  Y02E10/40

摘要： An electrolyte solution and the method of using same for electrodeposition of black chromium on a substrate, said solution comprising water, trivalent chromium ions, ions of a metal selected from the group consisting of iron and cobalt, a weak complexing agent for the trivalent chromium ions, and phosphate ions. The preferred complexing agents are hypophosphite or formate.

摘要翻译： 一种电解质溶液及其在基底上电沉积黑铬的方法，所述溶液包含水，三价铬离子，选自铁和钴的金属离子，三价铬离子的弱络合剂 ，和磷酸根离子。 优选的络合剂是次磷酸盐或甲酸盐。

公开(公告)号：US4159926A

公开(公告)日：1979-07-03

申请号：US856158

申请日：1977-11-30

申请人： Clive Barnes ,  John J. B. Ward

发明人： Clive Barnes ,  John J. B. Ward

IPC分类号： C25D3/12

CPC分类号： C25D3/12

摘要： A nickel electroplating bath comprises in aqueous solution at a pH of from 4 to 7, nickel ions at a Molar concentration of at least 0.25, chloride ions at a Molar concentration of at least 0.25, and a weak complexant for the nickel selected from formate, acetate, citrate, glutamate, anions and lactones of sugar acids and anions and lactones of acids having the formula X(C.sub.n H.sub.2n)COOH where X is OH or NH.sub.2 and n is 1 to 5, preferably 1 to 2, present at a Molar concentration of from 0.5 to 4.0 times that of the nickel. These baths have good throwing power and can be operated at convenient temperatures and pH values and at lower nickel ion concentrations than hitherto.

摘要翻译： 镍电镀浴在pH为4至7的水溶液中，摩尔浓度至少为0.25的镍离子，摩尔浓度至少为0.25的氯离子和选自甲酸盐， 乙酸盐，柠檬酸盐，谷氨酸盐，阴离子和内酯，具有式X（CnH2n）COOH的酸的阴离子和内酯，其中X是OH或NH 2，n是1至5，优选1至2，以摩尔浓度 为镍的0.5〜4.0倍。 这些浴具有良好的抛光力，并且可以在方便的温度和pH值下操作，并且在比以前更低的镍离子浓度下操作。