GB/T 31931-2015

Active

Zinc or zinc alloy coating on steel sheets or strips—Determination of hexavalent chromium content—1,5-Diphenylcarbohydrazide (diphenylcarbazide) spectrophotometric method

钢板及钢带锌及锌合金镀层中六价铬含量的测定二苯碳酰二肼分光光度法

Standard Type

GBT

ICS

77.080.01

CCS

H11

Status

现行

Issue Date

2015-09-11

Implementation

2016-06-01

Responsible Dept

中国钢铁工业协会

Drafting Unit

N/A

🔗 Related Standards / 同类标准

GB/T 4190-1984 Doped molybdenum bars GB/T 4189-1984 Doped tungsten bars GB/T 4188-1984 Molybdenum rods GB/T 4187-1984 Tungsten rods GB/T 4185-1984 Molybdenum-tungsten alloy bars GB/T 222-1984 Method of sampling steel for determination of chemical composition and permissible variations for product analysis GB/T 223.48-1985 Methods for chemical analysis of iron，steel and alloy--The semixylenol orange photometric method for the determination of bismuth content GB/T 223.42-1985 Methods for chemical analysis of iron，steel and alloy--The anion-exchange separation-bromopyrogallol red photometric method for the determination of tantalumcontent