FIELD: chemistry.
SUBSTANCE: invention relates to a method of forming a light-absorbing coating. Nickel-phosphorus film is deposited by electroplating at current density of up to 30 A/dm2 from an electrolyte solution consisting of 0.9-1.1 mol/l nickel sulphate hexahydrate, sodium phosphate 0.2-0.3 mol/l, carboxylic acid in the form of acetic acid 0.2-0.3 mol/l and dicarboxylic acid in form of succinic acid 0.1-0.2 mol/l, at working acidity of electrolyte of 4.5-5 pH and electrolyte temperature of 85-90 °C. Electroplated nickel-phosphorus film is subjected to thermal treatment at temperature from 200 to 250 °C and oxidised in a solution of sulphuric acid and sodium nitrate at temperature of 70-80 °C.
EFFECT: high efficiency of forming a light-absorbing coating.
1 cl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF FORMING LIGHT-ABSORBING COATING | 2014 |
|
RU2566905C1 |
| METHOD OF FORMING LIGHT-ABSORBING COATING | 2014 |
|
RU2570715C2 |
| OPTICAL SYSTEMS LIGHT-ABSORBING ELEMENTS ON THE STAINLESS STEEL SUBSTRATES PRODUCTION METHOD | 2018 |
|
RU2683883C1 |
| METHOD OF FORMING COATINGS ON PARTS OF ASSEMBLIES OF OPTICAL DEVICES | 2024 |
|
RU2840545C1 |
| METHOD OF MANUFACTURING LIGHT-ABSORBING ELEMENTS OF OPTICAL SYSTEMS ON STEEL SUBSTRATES | 2017 |
|
RU2672655C2 |
| USE OF 2-(9-(METHOXYCARBONYL)-1,6-DIOXO-1,3,4,6,7,8-HEXAHYDRO-2H-PYRIDO[1,2-α]PYRAZIN-7-YL)ACETIC ACID AS ADDITIVES INCREASING CORROSION RESISTANCE OF NICKEL-PHOSPHORUS COATINGS | 2024 |
|
RU2838989C1 |
| PROCEDURE FOR SEDIMENTATION OF COMPOSITE COATING NICKEL-VANADIUM-PHOSPHORUS-BORON NITRIDE | 2010 |
|
RU2437967C1 |
| GALVANOPLASTIC METHOD OF PREPARING WORKPIECES | 1992 |
|
RU2064534C1 |
| APPLICATION METHOD OF ELECTROLYTIC COPPER COATING TO PARTS FROM ALUMINIUM AND ITS ALLOYS | 2011 |
|
RU2471020C1 |
| METHOD FOR PRODUCING COMPOSITE METAL-DISPERSED COATING, DISPERSED SYSTEM FOR PRECIPITATION OF COMPOSITE METAL-DISPERSED COATING AND METHOD FOR ITS PRODUCTION | 2020 |
|
RU2746863C1 |
