name said

Medium and high temperature sealing agent

model/specification

PMHS 600

characteristics

Medium and high temperature sealing agent PMHS600 is a nickel-containing, light green powder. Compared with nickel acetate sealing agents, it has a good sealing effect. Due to the effect of special ingredients, there are fewer undesirable phenomena such as flowing color and fog in sealing holes.

conditions of use

package and storage

10 kg/box, stored in a cool and dry warehouse, strictly prohibited from direct sunlight, high temperatures and high temperatures, must be covered and sealed after use.

precautions

• With the use of hole sealing liquid and the introduction of water and acid and alkali, the pH value exceeds the use range, the hole sealing ability will decrease and powder substances will be easily produced. Lower the pH with dilute acetic acid and increase the pH with dilute sodium hydroxide solution.
• The sealing temperature is preferably above 90℃. If the sealing time is too long, powder will be generated on the workpiece. If the pH value exceeds the use range, the sealing ability will decrease, and powdery matter will also be generated.
• It is recommended to use acid-resistant and high-temperature filter for filtration.

• Accurately measure 10 ml of solution and add it to the Erlenmeyer flask.
• Add approximately 100 mL of deionized water, 10 mL of 25%-28% ammonia water, and a small amount of ammonium violet urea indicator to the conical flask.
• Shake well and titrate with 0.0100 mol/L EDTA-2Na. When the solution changes from light yellow to light purple, the end point is reached.

• Calculation: C (PMHS 600)=c*V*38.28

  C is the concentration of blocking agent solution-g/L, c is the mass concentration of EDTA-mol/L, and V is the volume of EDTA consumed-mL.