Effect of Temperature

Effect of Temperature 

Summary:

Acacia tilapia Pethanolic extract on copper corrosion inhibition

0.5N hydrochloric acid in the diet was studied in between 303-353K

Temperature. Inhibition of the increase of the concentration efficiency of the plant

Extraction. The corrosion rate decreases with increasing temperature, with the

Increasing inhibitor concentration ratio is blank. Adsorption inhibitors

Copper has been found to obey the Langmuir adsorption isotherm. The value of the

The activation energy (Ea) of the adsorption free energy (G), adsorption enthalpy (H), ad

Adsorption entropy (S) were calculated. G value indicates that the

EE-adsorbed copper PON physical properties. Surface Analysis (FT-

IR) also carried out to establish mechanisms to inhibit copper corrosion

In hydrochloric acid corrosion. Keywords:

Acacia tilapia, copper, acid corrosion, adsorption isotherm, kinetic parameters.

Introduction:

Copper is an important class of materials due to their wide range of industrial applications

Household products. Relatively ineffective copper metal corrosion of air and water slowly

The presence of a weak acid [1]. Dissolution of the copper chloride solution is very important

Electrolytic polishing and processing industry. For these reasons, attention has focused on

Behavior of copper chloride solution. Complexing agent in a different case, the etching

Medium, such as Cl-ions, resulting in two steps anodic dissolution of copper:

+ - Cu Cu + E

2 + - Cu + Cu + E

In neutral aqueous solution, in the presence of oxygen, the total copper anode reaction

Dissolution process is as follows:

2 + - Cu + 1/2O2 + H2O = Cu + 2OH

When the complexing agents such as Cl-, is present in an aqueous medium, corrosive, complex

Copper ions, such as cuprous chloride, must be considered. In the near-neutral pH range of oxygen-containing medium 2 -

Anodic reaction (immersion time at least) the following: have been shown to influence the mass transfer is significant copper anodic dissolution during

With cuprous chloride complexes as main product chlorination media [2].

Inhibitors is the most practical methods of corrosion protection, especially in the

Acid solution in order to prevent accidental metal dissolution and acid consumption [3-5]. Most of the front

Studies focused on preventing metal in an acid or alkaline solution, an organic compound

Containing nitrogen, sulfur and oxygen atoms is a corrosion inhibitor. Organic-based corrosion toxicity

Inhibitors environment in which search green corrosion inhibitors, as they are

Biodegradable, does not contain heavy metals or other toxic compounds. Some research groups

Reported successful use of naturally occurring substances that inhibit the corrosion of metals in acid

Alkaline environment. Investigation corrosion inhibition tannins, alkaloids, organic, amino

Acid and an organic dye plants originated interests, in addition to environmental and

Ecologically acceptable, plant products inexpensive, readily available and renewable energy

Materials. In addition, they can be extracted by the procedure is simple and low cost.

Tilapia is a legume Acacia Ash family. Plant extracts, the test

Positive tannins give strength corrosion gallic acid in the same order. Non-toxic

Zhezhong 有机 botanicals its anti microbial properties and sustainable production

As a green corrosion inhibitor has a wide range of applications. Acacia extract offers a

Good protection against corrosion of aluminum and copper. Alcoholic extract of tilapia Acacia

Contain terpenes, tannins, alkaloids, saponins, glycosides, nitrogen, phosphorus. Gallic acid,

Chlorogenic acid, flavan-3 ,4 - diol galloylated colorless anthocyanins, catechins (catechin) and 7,3 ', 4', 5,-tetrahydroxyflavan

3,4 - hexanediol from pods reported [6-9]. Get local and a 0.16 cm thick copper sheet mechanical cutting coupons

2

3x2.4 cm in size, having a uniform diameter of 0.12mm holes for the suspension of coupons

Test solution. Coupons mechanical cleaning and polishing fine emery sheet through

Quality exposed shiny polished surface. To remove any oils and organic impurities coupons

Degreased with acetone, and finally washed with deionized water, dried and stored in a desiccator. Exact weight

Samples were taken using an electronic balance.

Inhibitors material

In the natural state of the material plant (Acacia tilapia) is air dried (shade drying) 20-25

Day in the shade. Then fine-grained supply. 35 g fine power round in 1 liter of dried material

Bottom flask was added a sufficient amount of ethanol (350ml.) completely covered powder. That

RBF covered with plugs &, leaving 8-10 days. During the soaking, the completion of ethanol

Was heated under reflux for 24 hours. In order to suppress chemical concentration. Thereafter, distilled & then

Filtered to remove any suspended impurities. Be stored in a clean clogged the liquid extract

Bottles for further use. Acacia tilapia or extract reflux in a Soxhlet

Ethanol. The preparation OFTESTSOLUTIONS

0.5N HCl was added, prepared with doubly distilled water. 50 ml. Aggression

Solution (0.5N HCl in) was measured in six separate one hundred ml. Beaker labeled C-2, C-1, C-2, C-3, C-4 and C-

5. EEAnPwas adding increasing concentrations of the order, and thus 0.0488,0.0976,0.244,0.488

1.0248g/Lin C-1, C-2, C-3, C-4, C-5 beaker. No extract was added first beaker (C-0).

Reagents used were of analytical grade.

Weight loss measurements:

Each sample was suspended in a V-shaped glass capillaries and small hooks

Containing 50 ml of test solution (HCl) at different temperatures (303K to 353K) beaker. After

Sufficient exposure, test specimens were washed with tap water and finally washed with acetone.

After a sufficient period of time they are hanging in a desiccator and reweighed.

Surface Analysis:

Fourier transform infrared spectroscopy (FTIR)

By FT-IR analysis of the metal formed on the surface of the sample film properties. The dried

Mixing specimen scratched with KBr (1:100) to give a powder to prepare a pellet, and

Pellets were introduced into the Fourier transform infrared spectrophotometer FT-IR, 8400 Shimadzu

Japan Analytical samples were analyzed by scanning the sample through the wave number

Range 400-4000 cm Results and Discussion

Diet Study

Table 1 shows the inhibition efficiency value [IE%], the corrosion rate [A ±], absorption correction

Equilibrium constant [K] at various concentrations of inhibitor, in 0.5N hydrochloric acid ad

At various temperatures for 48 hours during impregnation solution.

From the mass loss values, inhibition efficiency [IE%] calculated using the following

Formula.

% IE = [(? Wood?) / MU] × 100 (1)

Where? Acres without inhibitor and quality loss? Mi is the weight loss inhibitors.

Mm of penetration of the corrosion rate, each (mmpy) may be obtained by the following equation

Corrosion rate (mmpy) = (MX 87.6) / area × time × density of metal (2)

Where? M represents the weight mg square centimeter area of ​​exposed metal surface, time to express

3

Hours of exposure and density of the metal g / cm means that.