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    Home > Coatings News > Paints and Coatings Market > Coating standard: SSPC code paint 20

    Coating standard: SSPC code paint 20

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    There is only one definition for the two kinds of zinc rich paint covered by the technical specifications: it can also protect the bare metal in the case of discontinuous coating film on the exposed bottom and small damaged parts 1.2 coatings can be divided into inorganic zinc powder and organic zinc powder 1.3 the technical specification does not cover the weldable primer, i.e shop maintenance primer, such as SSPC paint 30 1.4 zinc rich coating can be widely used in various environments, no matter whether its surface is coated with paint or not In different working environment, different kinds of zinc rich paint in the construction of the specific coating damage Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Paint Home News: 1 General 1.1 there is only one definition for two kinds of zinc rich paint covered by the technical specifications: it can also protect the bare metal in case of discontinuous coating film on the exposed and small damaged parts 1.2 coatings can be divided into inorganic zinc powder and organic zinc powder 1.3 the technical specification does not cover the weldable primer, i.e shop maintenance primer, such as SSPC paint 30 1.4 zinc rich coating can be widely used in various environments, no matter whether its surface is coated with paint or not Refer to sspc-ps instruction 12.00 or consult the paint manufacturer for relevant suggestions on zinc powder coating exposure specification (see Chapter 12.1 precautions) for specific coating damage in different working environment and different types of zinc rich paint during construction 1.5 zinc rich coating shall be able to be used alone or as primer in various coating matching systems, and suitable for spraying construction 2 application type 2.1 application of technical specification 2.1.1 zinc based paint that accords with this technical specification shall be arranged according to the varieties of the coating and zinc content 2.1.2 if there is no specified paint type, type I (inorganic zinc powder) and type II (organic zinc powder) are acceptable (see Chapter 2.3) 2.1.3 if no specific zinc content is specified, zinc powder content grades 1, 2 and 3 are acceptable (see Chapter 2.3) This type of zinc base paint can be made up of (1~3) components 2.2 the zinc rich paint described in this technical specification generally contains metal zinc powder, functional additives (additives), organic or inorganic paint main agent and corresponding solvents (see Chapter 12.2 precautions) 2.3 type of main paint agent 2.3.1 type I-A: secondary hardening inorganic zinc powder coating / water-soluble inorganic zinc powder Including silicate, phosphate and modifier, it must be able to cure by heating or by curing agent 2.3.2 type I-B: self curing inorganic zinc powder coating / water conditioning type It includes water-soluble silicate, tetraammonium silicate, phosphate and modifier The curing of this kind of coating is realized by the reaction of metal zinc, silicate, steel plate substrate and CO2 CO 2 will be produced during the evaporation of water 2.3.3 type I-C: self curing inorganic zinc / solvent adjusted type It includes titanium dioxide, organosilicon and silicon polymer modifier The curing of this kind of coating is the reaction between titanium, polysilicon and zinc metal, and the completion depends on the humidity in the atmosphere 2.3.4 type II organic zinc powder coating Organic zinc coating as described in this technical specification It is cured by chemical reaction or solvent volatilization (see Chapter 12.3 precautions) Under certain conditions, heating can promote drying and accelerate curing 2.4 classification of zinc powder content zinc powder coating shall be classified as follows according to the weight ratio of metal zinc powder in dry film: Level 1: zinc powder content ≥ 85%; Level 2: 77% ≤ zinc powder content < 85%; Level 3: 65% ≤ zinc powder content < 77% 3 reference standard 3.1 unless otherwise specified, only the latest issued and revised reference standards are valid in the invited bidding 3.2 in case of any inconsistency between the reference standards listed below and this technical specification, this technical specification shall prevail 3.3 SSPC standard and comprehensive Standard Guide (Guide13): Guide to confirm and use the product technical specification of computerized industrial coating and materials Pa2: measure dry film thickness of coating with magnetic film thickness meter * paint 29: sacrificial anode zinc base paint and basic efficacy Paint 30: solderable inorganic zinc base paint SP1: solvent cleaning SP5/NACE NO.1: metal white shot (sand) cleaning (surface treatment) PS guideline 12.00: guidelines for zinc rich paint coating systems * ps12.01: single zinc rich paint coating system 3.4 American ASTN international standard A572: steel structure specification standard for high strength low carbon alloy steel (coltan vanadium alloy) B117: salt spray test method D185: Test Method for fineness of paints, varnishes and pigments * d562: the method of measuring the viscosity of paint with the Stokes viscometer D520: Technical Specification for metallic zinc powder pigments D714: standard method for evaluating coating bubbles * d1296: Test Method for odor of volatile solvents and diluents * d1308: Test Method for the effect of household chemical cleaners and various organic topcoats * D1475: Test Method for specific gravity of paint * d1535: use "Munsell" color standard to determine the required color * d1640: Test Method for film formation, curing and drying of organic coatings at room temperature D1654: Test Method for evaluation of paint samples in corrosive environment * d2369: Test Method for volatile matter of paint * d2371: detection method of pigment content in solvent coating * d2621: Test Method for solid content of main agent in solvent coating by infrared method D3278: Test Method for measuring flash point of liquid with "setaflash" closed cup D3359: Test Method for adhesion by tape method D4380: sampling methods for liquid paints and related paints D4417: field test method for surface roughness of steel plate after sand blasting (shot blasting) * d5894: corrosion cycle test and qu (aging) test shall be conducted for paint sample (metal sample is painted) That is to say, the test shall be conducted in the dry / wet (FOG) alternative test chamber and the UV / condensate alternative test chamber 3.5 ANSI z129.1: warning signs for hazardous industrial chemicals 3.6 FSS American national technical specifications and standards f ed-s te-14 1: inspection, sampling and test methods for paints, varnishes, waxes and related materials * method 3011: (when opening the packaging barrel) the state of (paint) in the container * method 4331: spray properties * method 4541: appearance and properties of dry film Those with "*" standard are only for reference and are not listed as the requirements of this technical specification 4 composition of ingredients 4.1 the supplier shall fully provide the information of raw materials and relevant production processes used in the production of products 4.2 pigment 4.2.1 the main pigment composition in these coatings must be metallic zinc powder specified in ASTM d520 (see note 12.4), and the content of metallic zinc powder in dry film of paint film shall meet the requirements of chapter 2.5 4.2.2 other pigment components include physical pigment, drier, coloring pigment, anti sedimentation agent and activation period control agent 5 Standard test condition 5.1 test sample: test plate made of hot-rolled steel plate, conforming to ASTM as72, with the sample size of (100 × 150 × 3.2) mm or greater The sample plate shall be cleaned with solvent according to sspc-sp1 before sandblasting The test sample plate shall be sandblasted according to sspc-sp5 requirements, and the surface roughness shall be (44-57) m m The roughness test after sandblasting shall be carried out in accordance with method C of ASTM d4417 5.2 Construction: each coating shall be applied in accordance with the specifications recommended by the supplier in writing 5.3 dry film thickness: the dry film thickness DFT of the test plate coating shall meet the minimum thickness requirements recommended by the paint manufacturer in writing and shall not exceed 25m m of the minimum thickness specified by the paint manufacturer If there is no recommended thickness, the general thickness is required to be (60-90) m m The dry film thickness shall be measured in accordance with the provisions of "accessories" 5.4 curing: the drying and curing of the paint shall comply with the methods recommended in writing by the paint manufacturer Before the test, the painted test panel shall be placed and maintained for at least 30 days under the environment with relative humidity over 55% 5.5 scribe the acceleration line: scribe two parallel lines on the surface of the painted sample to expose the metal substrate under the coating Each line shall be at least 2.5cm away from the edge of both sides of the test panel, 5cm away from the top and bottom, and 6cm long at least Two lines can be scribed vertically or at a certain angle Refer to astmd1654 acceleration line marking operation procedure 5.6 back and side opening of test panel: seal the back and side opening of each test panel with a kind of paint and tape to provide necessary protection for these surfaces 6 Liquid coating 6.1 mixing: the liquid part of multi-component coating must be evenly mixed and dispersed, stable and sand-free, meeting the requirements of this technical specification 6.1.1 the pigment part (powder) of multi-component coating shall be dried and packed loose before mixing 6.1.2 the mixed paint shall be stirred with a mechanical mixer to achieve even dispersion without any bad form 6.1.3 after mixing, the residue of many kinds of coarse particles and paint skin shall be screened with 60 mesh filter screen according to the requirements of ASTM d185 (depending on different types), and its weight shall not be higher than 0.5% of the total weight of paint If it is a new technology product, the relevant parties can negotiate to determine (modify) the size of the mesh size of the screen (filter) 6.2 activation period: activation period of multi-component zinc rich coating For the paint that has been mixed according to the requirements of the paint manufacturer's product manual and is waiting for construction, the storage time shall not exceed the activation period The painter shall provide activation period data under different conditions due to the change of activation period caused by the change of humidity and temperature For those paints that are close to the end of the activation period, even if their mixing and construction are normal, their coatings must also be tested for adhesion according to the requirements of chapter 7.2 and qualified 6.3 storage period: no matter multi-component coating or single component coating, it is not allowed to thicken within the specified storage period, otherwise it will affect the paint performance and construction performance The coating and components shall be put into the sealed packaging barrel, which shall not be unsealed and stored at (10-32) ℃, without condensation within 6 months from the date of delivery
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