The reaction mechanism between nickel ion and butynediols in the electroless plating process was analyzed. The results show that the change of BOZ concentration is a quasi first-order reaction, the change of the nickel ion concentration is related to the BOZ density, and this change belongs to a higher order reaction. The reaction rate equation was determined as dC/dt=-8.585×10^(-4)+1.188×10^(-4)t-4.64×10^(-6)t^2+5.8×10^(-8)t^3-2.3×10^(-11)t^4. The activation energy of this process decreases as temperature increases, and it decreases with the BOZ concentration as 64-423 mg/L, it increases with the BOZ concentration as 123~240 mg/L. The S value is positively correlated to temperature, when the temperature is 80℃, the reaction rate and S value are the largest; while when the temperature is above 80℃ and BOZ concentration is over 160 mg/L, S value and the reaction rate decrease gradually.

結(jié)果表明老外美女视频A片，鍍液中BOZ濃度的變化是準(zhǔn)一級(jí)反應(yīng)1024手机看电影一区乳，鎳離子的濃度變化與BOZ的濃度有關(guān)，屬多級(jí)反應(yīng)国内自拍区在线下载视频免费观看网址，其反應(yīng)速率方程為dC/dt=-8.585×10^(-4)+1.188×10^(-4)t-4.64×10^(-6)t^2+5.8×10^(-8)t^3-2.3×10^(-11)t^4国产福利AV在线导航，反應(yīng)體系的活化能E隨溫度的升高而減少，隨BOZ濃度的變化而變化：當(dāng)BOZ濃度在64~123mg/L時(shí)，E線性減少性色生活毛片免费无码观看；在123~240mg/L時(shí)E線性增加无码亚洲成a人片在线观看无码。S隨溫度的升高而增加，當(dāng)溫度達(dá)到80℃時(shí)S值最大国产第一次破苞视频网站观看，反應(yīng)速度最大在线视频A片免费关看；當(dāng)溫度超過80℃，BOZ濃度大于160mg/L時(shí)亚洲免费色视频，蝎的值逐漸減少日韩综合精品1页在线观看，反應(yīng)速度降低。

The conductibility of graphite powder can be improved by plating copper on it, and its magnetic conductibility can also be improved by further plating nickel on the copper coating.

討論了化學(xué)鍍銅工藝條件天堂精品视频www在线，開發(fā)出一種導(dǎo)電導(dǎo)磁性能好黄色网址进入、密度小和價(jià)格低的鍍鎳石墨粉類導(dǎo)電填料

The invention provides a chemical nickel tungsten phosphorus plating solution for magnesium alloy, which consists of 10-20 g/L of nickel sulfate, 7-15 g/L of sodium tungstate, 29-50 g/L of sodium citrate, 14-30 g/L of sodium hypophosphite, 14-30 g/L of sodium carbonate, 5-12 g/L of ammonium bifluoride, additive accounting for 0.00005-0.003 percent of total weight and the balance being water.

本發(fā)明提供的是一種鎂合金化學(xué)鍍鎳鎢磷鍍液。它由硫酸鎳10-20g/L伊人网在线免费、鎢酸鈉7-15g/L欧洲一级电影免费播放视频、檸檬酸鈉29-50g/L、次亞磷酸鈉14-30g/L人人干人人色人人爽、碳酸鈉14-30g/L你懂的电影在线观看播放、氟化氫銨5-12g/L、占總重量0.00005-0.003％的添加劑和余量的水組成特黄把女人弄爽又粗又大A片。

In this paper, the pure nickel layer deposited on stainless steel surface has been obtained by pulse electro-plating from sulphamate nickel-based electrolyte.

本文采用氨基磺酸鎳高速鍍液通過脈沖電鍍?cè)诓讳P鋼基體上制得純鎳鍍層日韩在线精品福利网页视频。

In order to improve the diamond tool performance and the bond strength between substrate and plating, and to obtain the machining efficiency and tool life, this article applies the rare earths to the manufacture of electroplated diamond tools. The effect of LaCl_3·7H_2O additive contents on bright nickel electrodeposits was studied in a typical nickel electroplating solution.

為了進(jìn)一步提高金剛石工具性能及其與基體結(jié)合強(qiáng)度，進(jìn)而使金剛石工具的加工效率和使用壽命達(dá)到最佳的狀態(tài)国产成熟女人性满足视频，本文將稀土應(yīng)用于電鍍金剛石工具的制造欧美最强XXXX性受，以亮鎳鍍液配方為基礎(chǔ)，進(jìn)行了添加稀土LaCl_3·7H_2O的試驗(yàn)研究欧美A∨视频一中文字幕。

A lead-free process for electroless plating of all-bright nickel was established,and an all-bright Ni-P alloy coating was prepared using the established electroless plating process.

研究出了一種新型不含鉛的全光亮化學(xué)鍍鎳工藝国产经典露出偷窥91图片专区，獲得了全光亮的鎳磷合金鍍層。

Chemical raw materials: include a variety of plating materials and metal surface treatment agent: sodium such as tin, stannous chloride, pyrophosphate Asian tin, copper sulfate, nickel acetate, copper acetate, nickel fluoride, cobalt sulphate, acetic acid cobalt, hydrofluoric acid, anion exchange resin, cation exchange resin, scale inhibitors, cleaning agents, detergents,the phosphating agent, plate washer water, with the exception of Prince agents, rust removal agent, the American Iron and Steel room temperature blackening agent, on behalf of behalf of the black-white (open cylinder agents, supplements), and alloys such as gun color..

二天天日日日干“陈吃谙呤悠得夥压劭矗化工原料：包括各種電鍍?cè)霞敖饘俦砻嫣幚韯喝珏a酸鈉、氯化亞錫国产精品999视频、焦磷酸亞錫欧美精品永久、硫酸銅、醋酸鎳中文字幕乱伦91、醋酸銅黄色网站国产日本、氟化鎳、硫酸鈷日本.www、醋酸鈷91超碰国产在线、氫氟酸精品视频在线免费观看看、陰離子交換樹脂、陽離子交換樹脂东京热官网入口、阻垢劑404亚洲免费在线视频、清灰劑、除垢劑黄色免费高清视频一区二区三区、創(chuàng)輝的磷化劑这里只有精品在线国产、洗板水、除臘劑黄片一级无码视频在线、除油除銹劑性爱裸体视频、美國(guó)的鋼鐵常溫發(fā)黑劑、代白代黑欧美午夜艳、槍色黑合金等很操/很射。

Therefore, the nickel impurity in the chromium-plating bath was determined using spectrophotometry, which was based on the reaction between nickel ions and diacetyldioxime, generating a red complex, in the presence of alkali and ammonium per-sulfate. The measurement was carried out in 3cm color-matching cells at a wavelength of 510nm, using the sample without chromogenic agent as the reference.

在堿性和過硫酸銨存在的條件下，鎳離子與丁二酮肟生成水紅色配合物羞羞漫画免费观看网站，利用這一特性五月丁香六月婷婷在线综合观看，以丁二酮肟光度法測(cè)定鍍鉻溶液中鎳雜質(zhì)的含量，以不加顯色劑的試樣作參比液人人人人干人人摸人人，用3cm比色皿亚洲蝌蚪视频，在波長(zhǎng)510nm處測(cè)定。

The preparation methods of nickel-coated composite powder consisting of hydrothermal hydrogen reduction, electroless plating, decomposing of nickel carbonyl, and electroplating were summarized and its applications in thermal spraying field such as base, abradable seal, abrasion resistant, and self-lubricating coatings were introduced.

本文綜述了鎳包覆型復(fù)合粉末的制備方法无码一区一区，主要有水熱氫還原法日韩在线免费，化學(xué)鍍法，羰基鎳分解法和電鍍法黄黄黄视频网站；介紹了國(guó)內(nèi)外常見鎳包覆型復(fù)合粉末在熱噴涂領(lǐng)域中的應(yīng)用情況日韩欧美五码在线va、包括作為底層、封嚴(yán)涂層全免费A级毛片手机免费看、耐磨涂層和自潤(rùn)滑涂層材料办公室秘书无码激情AV。

Our professional committed to the linked to a plating, Shen copper basket, and the basket, the nickel basket,-socket board, socket board - Plating and other supplies.

本廠專業(yè)致力于電鍍用掛具，沉銅籃jiZZ成熟丰满韩国女人少妇、黑化籃亚洲视频在线毛片、化鎳金籃，插板架欧美性爱网站。，插板架等電鍍用品久久ri视频无码。