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    Home > Coatings News > Paints and Coatings Market > Coating technology: method for determination of MEQ value of Electrodeposited Coatings

    Coating technology: method for determination of MEQ value of Electrodeposited Coatings

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    The key points are as follows: the mEq value of Electrodeposited coatings is measured by automatic potentiometric titrator, buret and balance with accuracy of 1 / 100g Coating test reagent: 0.1mol/l KOH; 0.1mol/l HCl; tetrahydrofuran; Operation method: ① Take 10g of the bath solution (accurate to 10mg) and put it into a 250ml beaker, add 50ml of tetrahydrofuran, and mix well with electromagnetic stirring ② Use 0.1 mol / L KOH (HCl) at a speed of about 3ml / min Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Home of coatings: the mEq value of Electrodeposited coatings measuring equipment: automatic potentiometric titrator, buret, balance 1 / 100g precision Coating test reagent: 0.1mol/l KOH; 0.1mol/l HCl; tetrahydrofuran; operation method: ① take 10g of bath solution (accurate to 10mg) and put it into a 250ml beaker, add 50ml of tetrahydrofuran, and mix well with electromagnetic stirring ② Titrate with 0.1 mol / L KOH (HCl) at a rate of about 3ml / min ③ take the pH value as the horizontal axis and the number of ML consumed alkali as the vertical axis as the curve ④ Titrate until the neutralization point can be determined clearly ⑤ Connect the measured points smoothly, and find out the point where the curve intersects with the perpendicular of two parallel lines at one half according to the inflection point of the curve This point is the neutralization point, and the alkali (acid) consumption at this point is the total alkali (acid) consumption Calculation: mEq value = V / w × 100 × n, where: V - alkali (acid) consumption at neutralization point minus tetrahydrofuran alkali (acid) consumption (ML) w - weight of resin in sample (g) n-koh (HCl) equivalent concentration coating family is focused on coating, diatom mud, paint coating, coating process, news information and coating of fireproof coating, diatom mud, Paint coating, coating process, decoration knowledge and decoration effect drawing of fire retardant coating,
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