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GB/T 34550.2-2017 English PDF

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GB/T 34550.2-2017: Method for evaluation of cooling seawater treatment agents -- Part 2: Determination of scale inhibition performance
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Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 34550.2-2017	English	119	Add to Cart	3 days [Need to translate]	Method for evaluation of cooling seawater treatment agents -- Part 2: Determination of scale inhibition performance	Valid	GB/T 34550.2-2017

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Basic data

Standard ID	GB/T 34550.2-2017 (GB/T34550.2-2017)
Description (Translated English)	Method for evaluation of cooling seawater treatment agents -- Part 2: Determination of scale inhibition performance
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	A29
Classification of International Standard	07.060; 77.060
Word Count Estimation	6,672
Date of Issue	2017-09-29
Date of Implementation	2018-01-01
Quoted Standard	GB/T 6682; GB/T 12804; GB/T 12805; GB/T 12806; GB/T 12808; GB/T 15724
Regulation (derived from)	National Standard Notice 2017 No. 23
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies the water treatment chemicals to inhibit the cooling water calcium carbonate scale precipitation performance measurement method. This section applies to water treatment chemicals to inhibit the precipitation of calcium carbonate scale cooling scale determination of performance and evaluation.

GB/T 34550.2-2017: Method for evaluation of cooling seawater treatment agents -- Part 2: Determination of scale inhibition performance

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Method for evaluation of cooling seawater treatment agents - Part 2. Determination of scale inhibition performance ICS 07.060; 77.060 A29 National Standards of People's Republic of China Evaluation of performance of seawater cooling water treatment chemicals Part 2. Determination of scale inhibition Part 2.Determinationofscaleinhibitionperformance 2017-09-29 Posted 2018-01-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

GB/T 34550 "seawater cooling water treatment agent performance evaluation method" is divided into four parts. --- Part 1. Determination of corrosion inhibition; --- Part 2. Determination of scale inhibition; --- Part 3. Determination of inhibitory properties of bacteria and algae; --- Part 4. Dynamic simulation test methods. This section GB/T 34550 Part 2. This section drafted in accordance with GB/T 1.1-2009 given rules. This part is proposed by the State Oceanic Administration. This part of the National Marine Standardization Technical Committee (SAC/TC283) centralized. This part of the drafting unit. State Oceanic Administration Tianjin Institute of seawater desalination and utilization, Tianjin Tanggu Zhonghai anti-corrosion technology development company And Tianjin SDIC Jinneng Power Generation Co., Ltd. The main drafters of this section. Wu Yunfang, Cheng Guochen, Yin Jianhua, Jiao Chunlian, Xu Xu, Wu Dongxia, Zhang Wenshuai, Li Yunping, Xu Na. Evaluation of performance of seawater cooling water treatment chemicals Part 2. Determination of scale inhibition

1 Scope

GB/T 34550 provisions of this part of the water treatment chemicals to inhibit the precipitation of calcium carbonate scale cooling seawater scale inhibition performance measurement method. This section applies to water treatment chemicals to inhibit the precipitation of calcium carbonate scale cooling scale determination of performance and evaluation.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 6682 analytical laboratory water specifications and test methods GB/T 12804 laboratory glass measuring cylinder GB/T 12805 Laboratory glassware burette GB/T 12806 laboratory glassware single standard line capacity bottle GB/T 12808 laboratory glassware single standard pipette GB/T 15724 laboratory glassware beakers

3 principle

Using sea water as test water, adding water treatment agent to prepare a sample. The sample heated under conditions to promote accelerated decomposition of calcium bicarbonate Calcium carbonate. To a certain concentration ratio, after the balance, the determination of calcium ion concentration and alkalinity in the sample, calculate the calcium ion scale inhibition rate (η) and chloride Difference between concentration and alkalinity concentration (ΔA). For both phosphate (PO43-) and zinc ions (Zn2) deposition of calcium carbonate The impact of the addition of a certain amount of PO43- and Zn2 comprehensive assessment.

4 Reagents and materials

Except as otherwise specified, only analytical grade reagents and grade 3 water as defined in GB/T 6682 are used in the method. 4.1 seawater, taken from the seawater cooling project site. 4.2 water treatment agent stock solution .1.00 mL contains 2mg water treatment agent (dry basis). 4.3 pH standard buffer solution pH values at 25 ° C were 4.00, 6.86 and 9.18, respectively. 4.4 Triethanolamine solution (1 2). 4.5 Potassium hydroxide solution (200 g/L). Store in polyethylene bottle. 4.6 Phosphate stock solution [c (PO43 -) = 2.5 mg/mL] 3.583 g of dihydrogen phosphate previously dried in an oven at 105 ° C Potassium, dissolved in 300mL water, diluted to volume 1000mL, stored in polyethylene bottles. 4.7 Zinc salt stock solution [c (Zn2) = 2.5mg/mL] Weigh 11g zinc sulfate heptahydrate, dissolved in 300mL water, dilute to volume to 1000mL, stored in a glass reagent bottle. 4.8 silver nitrate standard solution [c (AgNO3) = 0.1mol/L]. 4.9 Disodium edetate standard solution [c (EDTA) = 0.01mol/L].

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