The Effect of NaOH on the Surface of Magnesium Alloy Ni-B Alloy Plating Properties

2011 ◽  
Vol 189-193 ◽  
pp. 347-350 ◽  
Author(s):  
Qing Hua Chang ◽  
Zhen Zhen Chang ◽  
Yu Ting Bai ◽  
Xiao Yu Chen ◽  
Die Peng
Keyword(s):  
Magnesium Alloy ◽  
Sodium Hydroxide ◽  
Deposition Rate ◽  
Electroless Plating ◽  
Boron Content ◽  
Optimal Concentration ◽  
Sodium Hydroxide Concentration ◽  
Coating Morphology ◽  
Coating Uniformity ◽  
Alloy Plating

In this paper, the effect of different concentrations of sodium hydroxide on the surface of magnesium alloy plating Ni-B alloys is studied. Focuse on the influence of different NaOH concentrations on electroless plating Ni-B alloy plating rate, coating morphology, and composition. Ascertain the optimal concentration of NaOH. The results showed that when the sodium hydroxide concentration is 50g / L, the deposition rate is the maximum, coating uniformity, structure compact, and boron content in the coating is the maximum.

The Influences of Additives on the Corrosion Resistant Properties of Electroless Plating Ni-Co-P Alloy on the AZ91D Magnesium Alloy

2014 ◽  
Vol 1004-1005 ◽  
pp. 733-736
Author(s):  
Zu Xiao Yu ◽  
Ya Li Sun ◽  
Xin Huang
Keyword(s):  
Magnesium Alloy ◽  
Deposition Rate ◽  
Electroless Plating ◽  
Acid Resistance ◽  
Ammonium Fluoride ◽  
Alloy Coating ◽  
Corrosion Current ◽  
Corrosion Properties ◽  
Corrosion Resistant ◽  
Az91d Magnesium Alloy

To improve the anti-corrosion properties of the AZ91D magnesium alloy, the electroless plating Ni-Co-P on the AZ91D magnesium alloy is necessary. The influences of additives (ammonium fluoride (NH4F) and hexamethylenetetramine (HMTA)) on deposition rate, corrosion rate, acid resistance, corrosion current, corrosion potential and webster hardness of electroless plating Ni-Co-P alloy coating, were investigated using electrochemical methods, etc. The results show that the deposition rate and corrosion resistance properties of electroless plating Ni-Co-P are obviously improved when the additives, including NH4F (2%) and hexamethylenetetramine (HMTA, 1%), are added into plating solution, respectively. In addition, the global particles in the Ni-Co-P coating become smaller with the addition of NH4F by comparison with no additives and coatings are dense, uniform and defect-free.

The Effect of Complexing Agent on the Surface of Aluminum Alloy Plating Ni-P Alloy

2011 ◽  
Vol 189-193 ◽  
pp. 332-335
Author(s):  
Qing Hua Chang ◽  
Zhen Zhen Chang ◽  
Yu Ting Bai ◽  
Xiao Yu Chen ◽  
Die Peng
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Deposition Rate ◽  
Acid Concentration ◽  
Malic Acid ◽  
Complexing Agents ◽  
Complexing Agent ◽  
Coating Uniformity ◽  
Alloy Plating ◽  
Electroless Ni

In this paper, the effect of different concentrations of complexing agent on the surface of aluminum alloy plating Ni-P alloys is studied. Study the influence of malic acid complexing agents on the electroless Ni-P alloy deposition rate, morphology, corrosion resistance, and determine the optimal complexing agent concentration. The results show that when the malic acid concentration is 24g /L, the deposition rate gets to maximum, and coating uniformity, structure compact and corrosion resistance is best.

scholarly journals Effects of Chemical Compositions on Plating Characteristics of Alkaline Non-Cyanide Electrogalvanized Coatings

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2101
Author(s):  
Thanyalux Wanotayan ◽  
Pongsakorn Kantichaimongkol ◽  
Viriyah Chobaomsup ◽  
Sirikarn Sattawitchayapit ◽  
Klaus Schmid ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Residual Stresses ◽  
Sodium Hydroxide ◽  
Deposition Rate ◽  
Chemical Compositions ◽  
High Deposition Rate ◽  
Zinc Bath ◽  
Throwing Power ◽  
Coating Surface ◽  
Coating Uniformity

The effects of zinc and sodium hydroxide concentrations in an alkaline non-cyanide zinc bath on the electrodeposition characteristics of zinc deposits are systematically investigated. Using microstructural and phase analyses of specimens with specifically designed geometries, the study indicates that the bath formulations critically control the electrogalvanizing characteristics and affect the coating surface morphology, deposition rate, throwing power, coating uniformity, and residual stresses developed during and after electrogalvanizing. The coatings produced from baths with a moderate Zn-to-NaOH ratio of 0.067–0.092 appear to provide uniform and compact deposits, moderately high deposition rate, and relatively low residual stresses.

Study on the Chemical Modification Process of Jute Fiber

TAPPI Journal ◽  
2010 ◽  
Vol 9 (2) ◽  
pp. 23-29 ◽  
Author(s):  
Wei-ming Wang ◽  
Zai-sheng Cai ◽  
Jian-yong Yu
Keyword(s):  
Sodium Hydroxide ◽  
Sodium Silicate ◽  
Treatment Time ◽  
Jute Fiber ◽  
Process Conditions ◽  
Silicate Concentration ◽  
Sodium Hydroxide Concentration ◽  
Liquor Ratio ◽  
Degumming Process ◽  
Selection Of

Degumming of pre-chlorite treated jute fiber was studied in this paper. The effects of sodium hydroxide concentration, treatment time, temperature, sodium silicate concentration, fiber-to-liquor ratio, penetrating agent TF-107B concentration, and degumming agent TF-125A concentration were the process conditions examined. With respect to gum decomposition, fineness and mechanical properties, sodium hydroxide concentration, sodium silicate concentration, and treatment time were found to be the most important parameters. An orthogonal L9(34) experiment designed to optimize the conditions for degumming resulted in the selection of the following procedure: sodium hydroxide of 12g/L, sodium silicate of 3g/L, TF-107B of 2g/L, TF-125A of 2g/L, treatment time of 105 min, temperature of 100°C and fiber to liquor ratio of 1:20. The effect of the above degumming process on the removal of impurities was also examined and the results showed that degumming was an effective method for removing impurities, especially hemicellulose.

Electroless Plating of Transition Metal Boride with High Boron Content as Superior HER Electrocatalyst

ChemCatChem ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3068-3075 ◽  
Author(s):  
Ruiqi Zhang ◽  
Huixiang Liu ◽  
Chenfeng Wang ◽  
Lincai Wang ◽  
Yanjing Yang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Electroless Plating ◽  
Boron Content ◽  
Metal Boride ◽  
High Boron

scholarly journals Central Composite Design and Desirability of RSM for Optimization of Biodiesel Production from Mixture of Animal Waste Fat Oil and used Cooking Oil

2020 ◽  
Vol 9 (4) ◽  
pp. 1565-1571
Keyword(s):  
Reaction Time ◽  
Sodium Hydroxide ◽  
Maximum Yield ◽  
Animal Waste ◽  
Sodium Hydroxide Concentration ◽  
Used Cooking Oil ◽  
Input Parameters ◽  
Desirability Approach ◽  
Central Composite ◽  
Waste Fat

In this work, central composite design(CCD) and desirability approach of Response surface methodology (RSM) has been used for optimization of biodiesel yield produced from mixture of animal waste fat oil and used cooking oil (AWO) in the ratio of 1:1through alkaline transesterification process. In this work, methanol quantity, reaction time and sodium hydroxide concentration are selected as input parameters and yield selected as response. The combined effect of methanol quantity, reaction time and sodium hydroxide concentration were investigated and optimized by using RSM. The second order model is generated to predict yield as a function of methanol quantity, reaction time and sodium hydroxide concentration. A statistical model predicted the maximum yield of 96.9779% at 35ml methanol quantity (% v/v of oil), 75 min. reaction time and 0.6g (% wt./v of oil) of sodium hydroxide. Experimentally, the maximum yield of 97% was obtained at the above optimized input parameters. The variation of 0.02% was observed between experimental and predicted values. In this work, an attempt has also made to use desirability approach of RSM to optimize the input parameters to predict maximum yield. Desirability approach predicts maximum yield (97.075%) at CH3OH (35.832% vol. /vol. of oil), NaOH (0.604 % wt./vol. of oil) and reaction time (79.054min.) was found for the AWO.

Laser Assisted Seeding for Electroless Plating on Insulators

1992 ◽  
Vol 285 ◽  
Author(s):  
A.G. Schrott ◽  
B. Braren ◽  
E.J.M. O'sullivan ◽  
R.F. Saraf
Keyword(s):  
Band Gap ◽  
Excimer Laser ◽  
Deposition Rate ◽  
Electroless Plating ◽  
Repetition Rate ◽  
Laser Light ◽  
Laser Pulses ◽  
Electron Excitation ◽  
Insulating Materials

ABSTRACTExcimer laser pulses with wavelengths of 248 and 308 nm were used to selectively seed Pd on SiO2 surfaces, making them suitable for electroless plating. This novel seeding process for insulating materials is accomplished with the sample immersed in the seeding solution, and occurs only on the areas of the substrate that are illuminated (through the liquid) by the laser light. The Pd content of the seeded samples increased with the number of pulses, but was rather independent of repetition rate. The deposition rate showed a dependence with wavelength consistent with a defect driven mechanism for electron excitation through the band gap of SiO2. These electrons then reduce the Pd ions in the solution in contact with the surface.

Adhesion of Rubber to Magnesium Alloys in the Presence of Nickel Branched Alkyl Carboxylates

2003 ◽  
Vol 76 (4) ◽  
pp. 1019-1030 ◽  
Author(s):  
K. Mori ◽  
X. Shi ◽  
H. Hirahara ◽  
Y. Oishi
Keyword(s):  
Aqueous Solution ◽  
Zinc Oxide ◽  
Magnesium Alloy ◽  
Aqueous Solutions ◽  
Sodium Hydroxide ◽  
Magnesium Alloys ◽  
Peel Strength ◽  
Magnesium Alloy Az31 ◽  
Rubber Compounds ◽  
Alkyl Carboxylates

Abstract The authors investigated the adhesion of rubber compounds containing nickel blanched alkyl carboxylate to surface treated magnesium alloys during curing. Ni i-octylate and Ni i-stearate were used as nickel branched alkyl carboxylate. Rubbers used in the study did not adhere at all to magnesium alloys, such as AZ91, AZ31, AZ 21, and M1 washed with acetone; not even in the presence of Ni i-octylate. Among numerous treating solutions, only sodium hydroxide aqueous solution was effective for adhesion of rubber to magnesium alloys. Adhesion of rubber to magnesium alloy AZ31 treated in 0.5M- sodium hydroxide aqueous solution for 10 min at 80 °C yielded high peel strength and a 100% rubber coverage. Peel strength and a 100% rubber coverage varied with the concentration of additives, such as curing accelerators, sulfur, zinc oxide and Ni-type adhesive accelerators. Ni branched alkyl carboxylates such as Ni i-octylate and Ni i-stearate were effective for accelerating the adhesion of rubber to magnesium alloys treated in sodium hydroxide aqueous solutions during curing. The authors postulate that Ni branched alkyl carboxylate acts to yield interface bonds between magnesium alloys and rubber or Ni-S-rubber linkage.

Study on Kinetics of Electroless Plating Palladiumon on Ni-P Coatings

2011 ◽  
Vol 233-235 ◽  
pp. 2840-2843
Author(s):  
Dao Xin Wu ◽  
Ying Liu ◽  
Zhong Liang Xiao
Keyword(s):  
Kinetic Equation ◽  
Deposition Rate ◽  
Electroless Plating ◽  
Single Factor ◽  
Technical Parameters ◽  
Factor Method ◽  
Kinetics Of

Single factor method was used to investigate the effects of the main technical parameters ,which was on the Pd deposition rate in electroless Pd plating process. The kinetic equation of palladium deposition was established. When the concentration of EDTA-2Na was less than 6g/L，V= 0.783 CA1.00784 CB0.15225 Cc-0.3373 CD0.29417 exp[10.76×103(T-298)/(298RT)] .When the concentration of EDTA-2Na was more than 6g/L ,V= 2.147CA1.00784 CB0.15225 Cc-0.3373 CD-0.33376 exp[10.76×103(T-298)/(298RT)] .

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