Summary for zinc oxide in phosphoric acid Discussion
Phosphating: can't dissolve zinc oxide in phosphoric acid is the core issue behind this thread, but the excerpt provided is only an editor’s note pointing readers to reference books rather than showing the original question or any technical replies. The note suggests several sources on phosphating and metal pretreatment, including Vinod Prasad Sharma’s *Optimization of Phosphating Process* (2022), Werner Rausch’s *Phosphating of Metals* (1991), D.B. Freeman’s *Phosphating & Metal Pretreatment* (1986), Guy Lorin’s *Phosphating of Metals* (1974), Biestek & Weber’s *Electrolytic and Chemical Conversion Coatings* (1972), and Edward P. Parry’s *Continuous Automated Analysis and Control of phosphatizing Baths* (1972). Because the actual discussion text is not included, no specific solution or consensus can be extracted from this excerpt alone.
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[editor appended this entry to this thread which already addresses it in lieu of spawning a duplicative thread]
Q. To whom it may concern, hello,
I am looking for a high quality zinc phosphate solution that has uniform coverage and good corrosion resistance and is also suitable for painting.
When I want to dissolve zinc oxide in phosphoric acid, if the amount of zinc oxide exceeds a certain limit, it is not dissolved in phosphoric acid and zinc oxide particles are scattered and precipitated in the form of white grains in the solution, and this makes the solution I don’t have proper phosphate.
Ingredients I use for zinc phosphate in 100 ml volume:
Zinc Oxide 1/8 g
Phosphoric acid 4/5 g
Sodium nitrate 0/5 g
Any information on this topic will be greatly appreciated.
Amin Babak
– Mashhad, Iran
April 28, 2024
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SUGGESTED PHOSPHATING BOOKS
(many of these are rare; the links will only sometimes work)
“Optimization of Phosphating Process” by Vinod Prasad Sharma (2022)
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AbeBooks, or
Amazon
“Phosphating of Metals” by Werner Rausch (1991)
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eBay,
AbeBooks, or
Amazon
“Phosphating & Metal Pretreatment” by D.B. Freeman (1986)
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eBay,
AbeBooks, or
Amazon
“Phosphating of Metals” by Guy Lorin (1974)
avail from
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AbeBooks, or
Amazon
“Electrolytic and Chemical Conversion Coatings” by Biestek & Weber (1972)
avail from
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AbeBooks, or
Amazon
“A Study of Manganese Phosphating Reactions” by Joseph Menke (1971)
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AbeBooks, or
Amazon
“Preparation of Metals for Painting” by Samuel Spring (1966)
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eBay,
AbeBooks, or
Amazon
“Continuous Automated Analysis and Control of phosphatizing Baths” by Edward P. Parry (1972)
avail from
<!–UTL eBay, –>
AbeBooks, or
Amazon
(as an Amazon Associate & eBay Partner, we earn from qualifying purchases)
Q. Hello
I want to make zinc phosphate (coarse grain). but I have a problem with dissolving of ZnO in phosphoric acid. How can I solve it ? Which formula do you introduce me to?
best.
Mansour Kashiha
coating shop – Tehran, Iran
April 25, 2008
A. If you want to make zinc phosphate solution for phosphating you can use zinc phosphate not zinc oxide and the chemical contents as following:
⇦ on
or
Amazon [affil link]
10 g/l
zinc phosphate
⇦ on
<!–UTL April 28,24
Amazon
–>
]
17 g/l
phosphoric acid
⇦ on
or
Amazon [affil link] 300 g/l
nickel nitrate 20 g/l
ammonia
⇦ on
or
Amazon [affil link] 8 g/l
With best regards,
Ali Gomaa
– Cairo, Egypt